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Questions tagged [opensmtpd]

An open-source implementation of the server-side SMTP protocol. Part of the OpenBSD project.

8 questions
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Trying to set up a mail server in OpenBSD: doveadm auth login fails

I set up an OpenBSD 7.0 instance on Vultr in order to get a mail server running with Dovecot and OpenSMTPD. I (mostly) followed the instructions here and here and a bit here. I set it up to use with virtual mail, creating files in…
Joe Blough
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How to configure OpenSMTPD with Amazon SES?

Amazon has instructions for postfix and sendmail, but not OpenSMTPD, so adding them here.
Neil McGuigan
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PHP's mail relay via OpenSMTPD returns error Message is not RFC 2822 compliant

I have the following setting in my php.ini [mail function] sendmail_path = /usr/sbin/sendmail -t -i Binary /usr/sbin/sendmail comes from the installed ssmtp package on Alpine Linux. I want to relay all emails to the opensmtpd container from the…
chingis
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Changing Port Number for OpenSMTPD

I am trying to telnet to my OpenSMTPD 6.0 mail server (Ubuntu 19), but I am consistently getting the error message: telnet mymachine.xyz.com 25 telnet: connect to address XX.XX.XX.XX: Connection refused I went through other tutorials and few of…
Ujjawal Sharma
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New email server (OpenBSD) not receiving emails sent from Gmail - but is receiving from other sources

I followed Derek Sivers' guide to tech independence, spun up an OpenBSD server, and followed various steps to provision an email server on it. From this server, I am able to send emails to various domains - gmail, hey.com, proton.me. I am able…
user2544700
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IP address not being sent to spamd

I have an IP address showing up in /var/log/maillog trying to connect to SMTPD. The attempt to connect always fails, but I want to send him to spamd instead so I ran the command: pfctl -t spamd -T add 123.456.78.90 pfctl -t spamd -T show shows…
Joe Blough
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OpenSMTPD Mail won't send from client, reason=ca-failure

Any time I attempt to send mail from my mail client (In this case, thunderbird), it comes up with an arbitrary error for why it couldn't send the email (The error doesn't matter, as it simply is telling me that the connection got dropped). When I…
Zane
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Is CVE-2020-8794 a logical issue?

From: https://www.qualys.com/2020/02/24/cve-2020-8794/lpe-rce-opensmtpd-default-install.txt LPE and RCE in OpenSMTPD's default install (CVE-2020-8794) AFAIK I can read from this longer post, that it is based on an "out-of-bounds read". The Big…
BenB1992
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