What this ISP server stuff is about regarding creating your own email server [closed]
I am in the process of learning how email servers work, and noticed this:
I use the SMTP server of my ISP to deliver e-mail.... Something as simple as hosting it at home, with a dynamic IP from your ISP, is enough to get yourself blacklisted.... Ideally I'd use an SMTP server in a country without data retention laws.
So I don't fully understand yet the difference between MTA and MDA, so I'm not sure what the "SMTP server of my ISP (Internet Service Provider)" is describing. Wondering if one could describe what that is exactly. I am wondering why I can't just create my own SMTP server to solve this problem.
networking email smtp
asked Dec 11 at 1:24
Lance Pollard
2941311
closed as unclear what you're asking by rahuldottech, JakeGould, PeterH, music2myear, Twisty Impersonator Dec 12 at 1:27
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
|
show 3 more comments
I am in the process of learning how email servers work, and noticed this:
I use the SMTP server of my ISP to deliver e-mail.... Something as simple as hosting it at home, with a dynamic IP from your ISP, is enough to get yourself blacklisted.... Ideally I'd use an SMTP server in a country without data retention laws.
So I don't fully understand yet the difference between MTA and MDA, so I'm not sure what the "SMTP server of my ISP (Internet Service Provider)" is describing. Wondering if one could describe what that is exactly. I am wondering why I can't just create my own SMTP server to solve this problem.
networking email smtp
asked Dec 11 at 1:24
Lance Pollard
2941311
closed as unclear what you're asking by rahuldottech, JakeGould, PeterH, music2myear, Twisty Impersonator Dec 12 at 1:27
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
ISP: Has SMTP servers, can be used by you. You: Should use them. Using residential IPs will get you blacklisted from many email services because residential IPs are commonly associated with spam. You can totally get a VPS or cloud service and safely host an SMTP server on there tho
– rahuldottech
Dec 11 at 1:28
Still, I would like to know how it works. I don't plan on doing any home hosting, I would use the cloud if I were to ever implement this.
– Lance Pollard
Dec 11 at 1:29
2
How what works? Mail servers? Too broad for the scope of this site. You can totally set one up on your home PC and play around with it though. Just don't use it to actually send mail you want delivered.
– rahuldottech
Dec 11 at 1:30
3
SMTP is a type of server (or rather, technology). Postfix is MTA software. Dovecot is a software implementation of an IMAP/POP3 server. Look these terms up. They're different things. This question is unclear, too broad, and potentially off-topic for this site. Everything you are asking it can be found out with minimal searching on the web.
– rahuldottech
Dec 11 at 1:34
1
At the end of the day the extremely stratospheric high level view of this is that there is nothing at all stopping you from creating an SMTP server. But due to abuse of independent mail systems by spammers, there is a whole ecosystem of protections that make sure that unless your SMTP server is recognized as “legit” by the world pretty much all of the mail you send and receive from that server will just be tagged as SPAM.
– JakeGould
Dec 11 at 2:13
|
show 3 more comments
I am in the process of learning how email servers work, and noticed this:
I use the SMTP server of my ISP to deliver e-mail.... Something as simple as hosting it at home, with a dynamic IP from your ISP, is enough to get yourself blacklisted.... Ideally I'd use an SMTP server in a country without data retention laws.
So I don't fully understand yet the difference between MTA and MDA, so I'm not sure what the "SMTP server of my ISP (Internet Service Provider)" is describing. Wondering if one could describe what that is exactly. I am wondering why I can't just create my own SMTP server to solve this problem.
networking email smtp
asked Dec 11 at 1:24
Lance Pollard
2941311
I am in the process of learning how email servers work, and noticed this:
I use the SMTP server of my ISP to deliver e-mail.... Something as simple as hosting it at home, with a dynamic IP from your ISP, is enough to get yourself blacklisted.... Ideally I'd use an SMTP server in a country without data retention laws.
So I don't fully understand yet the difference between MTA and MDA, so I'm not sure what the "SMTP server of my ISP (Internet Service Provider)" is describing. Wondering if one could describe what that is exactly. I am wondering why I can't just create my own SMTP server to solve this problem.
networking email smtp
networking email smtp
asked Dec 11 at 1:24
Lance Pollard
2941311
asked Dec 11 at 1:24
Lance Pollard
2941311
asked Dec 11 at 1:24
Lance Pollard
2941311
asked Dec 11 at 1:24
Lance Pollard
2941311
asked Dec 11 at 1:24
Lance Pollard
2941311
2941311
closed as unclear what you're asking by rahuldottech, JakeGould, PeterH, music2myear, Twisty Impersonator Dec 12 at 1:27
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
closed as unclear what you're asking by rahuldottech, JakeGould, PeterH, music2myear, Twisty Impersonator Dec 12 at 1:27
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
ISP: Has SMTP servers, can be used by you. You: Should use them. Using residential IPs will get you blacklisted from many email services because residential IPs are commonly associated with spam. You can totally get a VPS or cloud service and safely host an SMTP server on there tho
– rahuldottech
Dec 11 at 1:28
Still, I would like to know how it works. I don't plan on doing any home hosting, I would use the cloud if I were to ever implement this.
– Lance Pollard
Dec 11 at 1:29
2
How what works? Mail servers? Too broad for the scope of this site. You can totally set one up on your home PC and play around with it though. Just don't use it to actually send mail you want delivered.
– rahuldottech
Dec 11 at 1:30
3
SMTP is a type of server (or rather, technology). Postfix is MTA software. Dovecot is a software implementation of an IMAP/POP3 server. Look these terms up. They're different things. This question is unclear, too broad, and potentially off-topic for this site. Everything you are asking it can be found out with minimal searching on the web.
– rahuldottech
Dec 11 at 1:34
1
At the end of the day the extremely stratospheric high level view of this is that there is nothing at all stopping you from creating an SMTP server. But due to abuse of independent mail systems by spammers, there is a whole ecosystem of protections that make sure that unless your SMTP server is recognized as “legit” by the world pretty much all of the mail you send and receive from that server will just be tagged as SPAM.
– JakeGould
Dec 11 at 2:13
|
show 3 more comments
ISP: Has SMTP servers, can be used by you. You: Should use them. Using residential IPs will get you blacklisted from many email services because residential IPs are commonly associated with spam. You can totally get a VPS or cloud service and safely host an SMTP server on there tho
– rahuldottech
Dec 11 at 1:28
Still, I would like to know how it works. I don't plan on doing any home hosting, I would use the cloud if I were to ever implement this.
– Lance Pollard
Dec 11 at 1:29
2
How what works? Mail servers? Too broad for the scope of this site. You can totally set one up on your home PC and play around with it though. Just don't use it to actually send mail you want delivered.
– rahuldottech
Dec 11 at 1:30
3
SMTP is a type of server (or rather, technology). Postfix is MTA software. Dovecot is a software implementation of an IMAP/POP3 server. Look these terms up. They're different things. This question is unclear, too broad, and potentially off-topic for this site. Everything you are asking it can be found out with minimal searching on the web.
– rahuldottech
Dec 11 at 1:34
1
At the end of the day the extremely stratospheric high level view of this is that there is nothing at all stopping you from creating an SMTP server. But due to abuse of independent mail systems by spammers, there is a whole ecosystem of protections that make sure that unless your SMTP server is recognized as “legit” by the world pretty much all of the mail you send and receive from that server will just be tagged as SPAM.
– JakeGould
Dec 11 at 2:13
ISP: Has SMTP servers, can be used by you. You: Should use them. Using residential IPs will get you blacklisted from many email services because residential IPs are commonly associated with spam. You can totally get a VPS or cloud service and safely host an SMTP server on there tho
– rahuldottech
Dec 11 at 1:28
ISP: Has SMTP servers, can be used by you. You: Should use them. Using residential IPs will get you blacklisted from many email services because residential IPs are commonly associated with spam. You can totally get a VPS or cloud service and safely host an SMTP server on there tho
– rahuldottech
Dec 11 at 1:28
Still, I would like to know how it works. I don't plan on doing any home hosting, I would use the cloud if I were to ever implement this.
– Lance Pollard
Dec 11 at 1:29
Still, I would like to know how it works. I don't plan on doing any home hosting, I would use the cloud if I were to ever implement this.
– Lance Pollard
Dec 11 at 1:29
2
2
How what works? Mail servers? Too broad for the scope of this site. You can totally set one up on your home PC and play around with it though. Just don't use it to actually send mail you want delivered.
– rahuldottech
Dec 11 at 1:30
How what works? Mail servers? Too broad for the scope of this site. You can totally set one up on your home PC and play around with it though. Just don't use it to actually send mail you want delivered.
– rahuldottech
Dec 11 at 1:30
3
3
SMTP is a type of server (or rather, technology). Postfix is MTA software. Dovecot is a software implementation of an IMAP/POP3 server. Look these terms up. They're different things. This question is unclear, too broad, and potentially off-topic for this site. Everything you are asking it can be found out with minimal searching on the web.
– rahuldottech
Dec 11 at 1:34
SMTP is a type of server (or rather, technology). Postfix is MTA software. Dovecot is a software implementation of an IMAP/POP3 server. Look these terms up. They're different things. This question is unclear, too broad, and potentially off-topic for this site. Everything you are asking it can be found out with minimal searching on the web.
– rahuldottech
Dec 11 at 1:34
1
1
At the end of the day the extremely stratospheric high level view of this is that there is nothing at all stopping you from creating an SMTP server. But due to abuse of independent mail systems by spammers, there is a whole ecosystem of protections that make sure that unless your SMTP server is recognized as “legit” by the world pretty much all of the mail you send and receive from that server will just be tagged as SPAM.
– JakeGould
Dec 11 at 2:13
At the end of the day the extremely stratospheric high level view of this is that there is nothing at all stopping you from creating an SMTP server. But due to abuse of independent mail systems by spammers, there is a whole ecosystem of protections that make sure that unless your SMTP server is recognized as “legit” by the world pretty much all of the mail you send and receive from that server will just be tagged as SPAM.
– JakeGould
Dec 11 at 2:13
|
show 3 more comments
2 Answers
2
active
oldest
votes
One common way many mail servers deal with spam is with blacklists available from many different providers. Many of them assume, possibly correctly, that any mail server running on a dynamic address is a spammer. On the bright side, this basically greatly decreases the value of your PC to any hacker or skiddy who compromises it as a mail server. That said, it basically makes it nearly impossible to run your own mail server at home.
Essentially spammers ruined everything and in the modern context, you need to cross every t, and dot every i and hope your IP has never ever been used for spam ever to be able to run a mail server.
So
Something as simple as hosting it at home, with a dynamic IP from your ISP, is enough to get yourself blacklisted.
Basically what many spam filters do is find ranges of IP addresses assigned to home ISPs and block the whole lot.
Port blocks are another thing - my ISP is vaguely famous for that, blocking protocols like smb over 20 year old exploits.
More or less? Nothing good comes of running a mail server at home, and many server hosts and other organisations will do everything they can to stop you from potentially shooting yourself in the foot by doing so.
answered Dec 11 at 2:00
Journeyman Geek♦
112k43216366
add a comment |
Are you asking about policy? Most ISP's block port 25 which is the SMTP port. The result is even if you have a email server on your LAN, it won't be able to send out email. This is due to previous history in which many malware systems used to infect people's systems and send spam from their machines. Some ISP's will allow you to use port 25, but if other systems start seeing your email address' IP address changing, they will sometimes flag it as a possible spam source for the historical reason.
answered Dec 11 at 1:47
Blackbeagle
6,3811623
add a comment |
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
One common way many mail servers deal with spam is with blacklists available from many different providers. Many of them assume, possibly correctly, that any mail server running on a dynamic address is a spammer. On the bright side, this basically greatly decreases the value of your PC to any hacker or skiddy who compromises it as a mail server. That said, it basically makes it nearly impossible to run your own mail server at home.
Essentially spammers ruined everything and in the modern context, you need to cross every t, and dot every i and hope your IP has never ever been used for spam ever to be able to run a mail server.
So
Something as simple as hosting it at home, with a dynamic IP from your ISP, is enough to get yourself blacklisted.
Basically what many spam filters do is find ranges of IP addresses assigned to home ISPs and block the whole lot.
Port blocks are another thing - my ISP is vaguely famous for that, blocking protocols like smb over 20 year old exploits.
More or less? Nothing good comes of running a mail server at home, and many server hosts and other organisations will do everything they can to stop you from potentially shooting yourself in the foot by doing so.
answered Dec 11 at 2:00
Journeyman Geek♦
112k43216366
add a comment |
One common way many mail servers deal with spam is with blacklists available from many different providers. Many of them assume, possibly correctly, that any mail server running on a dynamic address is a spammer. On the bright side, this basically greatly decreases the value of your PC to any hacker or skiddy who compromises it as a mail server. That said, it basically makes it nearly impossible to run your own mail server at home.
Essentially spammers ruined everything and in the modern context, you need to cross every t, and dot every i and hope your IP has never ever been used for spam ever to be able to run a mail server.
So
Something as simple as hosting it at home, with a dynamic IP from your ISP, is enough to get yourself blacklisted.
Basically what many spam filters do is find ranges of IP addresses assigned to home ISPs and block the whole lot.
Port blocks are another thing - my ISP is vaguely famous for that, blocking protocols like smb over 20 year old exploits.
More or less? Nothing good comes of running a mail server at home, and many server hosts and other organisations will do everything they can to stop you from potentially shooting yourself in the foot by doing so.
answered Dec 11 at 2:00
Journeyman Geek♦
112k43216366
add a comment |
One common way many mail servers deal with spam is with blacklists available from many different providers. Many of them assume, possibly correctly, that any mail server running on a dynamic address is a spammer. On the bright side, this basically greatly decreases the value of your PC to any hacker or skiddy who compromises it as a mail server. That said, it basically makes it nearly impossible to run your own mail server at home.
Essentially spammers ruined everything and in the modern context, you need to cross every t, and dot every i and hope your IP has never ever been used for spam ever to be able to run a mail server.
So
Something as simple as hosting it at home, with a dynamic IP from your ISP, is enough to get yourself blacklisted.
Basically what many spam filters do is find ranges of IP addresses assigned to home ISPs and block the whole lot.
Port blocks are another thing - my ISP is vaguely famous for that, blocking protocols like smb over 20 year old exploits.
More or less? Nothing good comes of running a mail server at home, and many server hosts and other organisations will do everything they can to stop you from potentially shooting yourself in the foot by doing so.
answered Dec 11 at 2:00
Journeyman Geek♦
112k43216366
One common way many mail servers deal with spam is with blacklists available from many different providers. Many of them assume, possibly correctly, that any mail server running on a dynamic address is a spammer. On the bright side, this basically greatly decreases the value of your PC to any hacker or skiddy who compromises it as a mail server. That said, it basically makes it nearly impossible to run your own mail server at home.
Essentially spammers ruined everything and in the modern context, you need to cross every t, and dot every i and hope your IP has never ever been used for spam ever to be able to run a mail server.
So
Something as simple as hosting it at home, with a dynamic IP from your ISP, is enough to get yourself blacklisted.
Basically what many spam filters do is find ranges of IP addresses assigned to home ISPs and block the whole lot.
Port blocks are another thing - my ISP is vaguely famous for that, blocking protocols like smb over 20 year old exploits.
More or less? Nothing good comes of running a mail server at home, and many server hosts and other organisations will do everything they can to stop you from potentially shooting yourself in the foot by doing so.
answered Dec 11 at 2:00
Journeyman Geek♦
112k43216366
answered Dec 11 at 2:00
Journeyman Geek♦
112k43216366
answered Dec 11 at 2:00
Journeyman Geek♦
112k43216366
answered Dec 11 at 2:00
Journeyman Geek♦
112k43216366
112k43216366
add a comment |
add a comment |
Are you asking about policy? Most ISP's block port 25 which is the SMTP port. The result is even if you have a email server on your LAN, it won't be able to send out email. This is due to previous history in which many malware systems used to infect people's systems and send spam from their machines. Some ISP's will allow you to use port 25, but if other systems start seeing your email address' IP address changing, they will sometimes flag it as a possible spam source for the historical reason.
answered Dec 11 at 1:47
Blackbeagle
6,3811623
add a comment |
Are you asking about policy? Most ISP's block port 25 which is the SMTP port. The result is even if you have a email server on your LAN, it won't be able to send out email. This is due to previous history in which many malware systems used to infect people's systems and send spam from their machines. Some ISP's will allow you to use port 25, but if other systems start seeing your email address' IP address changing, they will sometimes flag it as a possible spam source for the historical reason.
answered Dec 11 at 1:47
Blackbeagle
6,3811623
add a comment |
Are you asking about policy? Most ISP's block port 25 which is the SMTP port. The result is even if you have a email server on your LAN, it won't be able to send out email. This is due to previous history in which many malware systems used to infect people's systems and send spam from their machines. Some ISP's will allow you to use port 25, but if other systems start seeing your email address' IP address changing, they will sometimes flag it as a possible spam source for the historical reason.
answered Dec 11 at 1:47
Blackbeagle
6,3811623
Are you asking about policy? Most ISP's block port 25 which is the SMTP port. The result is even if you have a email server on your LAN, it won't be able to send out email. This is due to previous history in which many malware systems used to infect people's systems and send spam from their machines. Some ISP's will allow you to use port 25, but if other systems start seeing your email address' IP address changing, they will sometimes flag it as a possible spam source for the historical reason.
answered Dec 11 at 1:47
Blackbeagle
6,3811623
answered Dec 11 at 1:47
Blackbeagle
6,3811623
answered Dec 11 at 1:47
Blackbeagle
6,3811623
answered Dec 11 at 1:47
Blackbeagle
6,3811623
6,3811623
add a comment |
add a comment |
ISP: Has SMTP servers, can be used by you. You: Should use them. Using residential IPs will get you blacklisted from many email services because residential IPs are commonly associated with spam. You can totally get a VPS or cloud service and safely host an SMTP server on there tho
– rahuldottech
Dec 11 at 1:28
Still, I would like to know how it works. I don't plan on doing any home hosting, I would use the cloud if I were to ever implement this.
– Lance Pollard
Dec 11 at 1:29
2
How what works? Mail servers? Too broad for the scope of this site. You can totally set one up on your home PC and play around with it though. Just don't use it to actually send mail you want delivered.
– rahuldottech
Dec 11 at 1:30
3
SMTP is a type of server (or rather, technology). Postfix is MTA software. Dovecot is a software implementation of an IMAP/POP3 server. Look these terms up. They're different things. This question is unclear, too broad, and potentially off-topic for this site. Everything you are asking it can be found out with minimal searching on the web.
– rahuldottech
Dec 11 at 1:34
1
At the end of the day the extremely stratospheric high level view of this is that there is nothing at all stopping you from creating an SMTP server. But due to abuse of independent mail systems by spammers, there is a whole ecosystem of protections that make sure that unless your SMTP server is recognized as “legit” by the world pretty much all of the mail you send and receive from that server will just be tagged as SPAM.
– JakeGould
Dec 11 at 2:13