What are the problems related to sendmail and their solutions

What are the sendmail-related problems and solutions? in view of this problem, this article introduces the corresponding analysis and solutions in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible way.

For people who have used sendmail, they all know that the failure of sendmail to send email is also a common problem. The following is a personal summary of the problems and solutions of sendmail. Of course, if there are other solutions, I hope you will not hesitate to comment.

Sendmail question:

1.403 4.7.0 TLS handshake failed.

Solution:

(1) add the following to the / etc/mail/access file:

There are two ways to write:

Try_TLS:IP address NO

Try_TLS:MX record NO

(2) make the above configuration effective: makemap hash / etc/mail/access.db < / etc/mail/access

2.Relaying denied. IP name possibly forged [IP address]

Solution:

(1) add the following to the / etc/mail/access file:

Connect: IP address RELAY

(2) make the above configuration effective: makemap hash / etc/mail/access.db < / etc/mail/access

3. If a domain name has multiple mx records, but there are individual mx records, port 25 is not available, and some ports 25 can be connected normally, then we need to point the domain to the new mx record so that it can send email normally.

Solution:

(1) add the following line to the etc/mail/mailertable file:

Domain relay: [ip]

Or

Domain relay: [mx record]

(2) make the above configuration effective: makemap hash / etc/mail/mailertable.db < / etc/mail/mailertable

The answers to the questions related to sendmail and the solutions are shared here. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel to learn more about it.