Tag: opensmtpd
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OpenSMTPD and Thunderbird: smtp-in: Bad input on session 5.5.1 Invalid command: Pipelining not supported
While trying to connect to OpenSMTPD running on Debian Stretch Thunderbird couldn’t auto-configure the account and provided the following error in the logs: email smtpd[566]: smtp-in: Bad input on session 6567905e3020707c: 500 5.5.1 Invalid command: Pipelining not supported This is a Thunderbird config issue, not a server side issue. Change the settings from…