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postfix/smtp[27379]: cannot load Certificate Authority data: disabling TLS support postfix/smtp[27379]: warning: TLS library problem: error:02001002:system library:fopen:No such file or directory:bss_file.c:169:fopen('/etc/postfix/cacert.pem','r'): Install certificates of Certification Authorities - they certify other certificates => install package ...


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Could you please show us the telnet commands used to produce this issue? so that we can reproduce it and fix it. By the way, iRedMail team offers very active support on the online support forum: http://www.iredmail.org/forum/ it's better to ask for support in the forum.


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You may use formail program to feed "one by one" messages in mailbox-file to program/script of your choice. Below please find elaborate example of using formail -s ... to process user system mailboxfile. It is provided in man procmail and makes procmail process every message in the system mailbox. #!/bin/sh ORGMAIL=/var/mail/$LOGNAME if cd $HOME ...


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Have you set PostmasterCopy in your sendmail.cf? grep PostmasterCopy /etc/mail/sendmail.cf YES => You may turn it off confCOPY_ERRORS_TO PostmasterCopy


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Make sendmail at test machine capture/deliver outgoing mails to local mailbox/alias e.g. capture. sendmail.mc line to capture ALL outgoing emails (sendmail.mc requires compilation into sendmail.cf): define(`SMART_HOST',`local:capture')dnl mailertable line to capture email to specific test domains: example.com local:capture1 example.net ...


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Name server:example.com: host not found Is not necessarily a sendmail specific problem but most likely a generic DNS issue. The hostname (or MX record) for example.com can't be resolved. Check if dig any example.com also gives an error => DNS problem that needs to be resolved as even when configured with a Smart Host by default sendmail still does a ...


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Hbruijn response seems to be correct, bsically, whenever any user in the machine (root or other) has a cript running in brtch mode without a window where toi address standard output messages, such a messages are addressed to @ address and, even, addressed to root, meanng "Warning: you have some process writing message you cannot red, so take care of email".


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As you can see, once you group those log entries by internal message ID, those are email messages that stay within your server: u3OHZ16M030895: from=root ... u3OHZ16M030895: to=root ... (u3OHZ1UJ030896 Message accepted for delivery) and u3OHZ1UJ030896: from=<root@ip-1xx-xx-xx-1xx.secureserver.net> ... u3OHZ1UJ030896: ...


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I think Google's response is a bit disingenuous. Even though their "error message" mentions PTR, the 550 5.7.1 is about relaying. I too was getting this error on a Postfix / Dovecot install, but I fixed it via a few step: Adding the IPv6 IP info to your ifcfg-eth0 config on the mail server Adding a AAAA MX record on your DNS Adding the IPv6 ranges of all ...


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You should use Amazon SES. Maintaining an SMTP server on EC2 is expensive and not worth the effort. However, do keep in mind that Amazon encourages proper email behaviour so you should keep track of your bounces and remove such invalid email addresses. You might get your sending quota reduced ot even blocked if there are bounces. They have SES best ...


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According to this thread, the fallback feature tls_failures was implemented in this patch. Apparently this will use plain text automatically after a certain number of TLS handshake failures. Note: this patch is integrated in 8.16 (at least available as snapshot) As of this post, 8.16 is not yet released, so for now you will have to use ...


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Step 1) Undo what you did Step 2) In /etc/aliases append "info: foo.bar" Step 3) Run /usr/bin/newaliases Step 4) Use postfix


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sendmail applies virtusertable to some domains. Is the domain on list of loacl email domains ($=w) or virtual domains ($={VirtHost})? As root execute the following test commands: echo '$=w' | sendmail -bt echo '$={VirtHost}' | sendmail -bt


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It appears that unlike other public mail servers(Yahoo!, Hotmail) Gmail must verifies corresponding IP address under SPF record. And since sendmail was keep sending emails via IPv6, it was not there in SPF record. So all I did was to simply add IPv6 into SPF record and all went fine. So, now my SPF record looks something like this v=spf1 mx a ...



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