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XCLIENT command causes MailSlurper to reject email #145

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FlyingDR opened this issue Feb 3, 2021 · 0 comments
Open

XCLIENT command causes MailSlurper to reject email #145

FlyingDR opened this issue Feb 3, 2021 · 0 comments

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@FlyingDR
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FlyingDR commented Feb 3, 2021

Several clients may send XCLIENT command (introduced by Postfix as SMTP extension) within SMTP session.

Practical example is an attempt to put MailSlurper behind Nginx SMTP proxy because it have xclient on by default.

This behavior caused MailSlurper to stop SMTP session with error:

level=error msg="Problem finding command from input" error="Command 'xclient addr=xx.xx.xx.xx login=[redacted] name=[unavailable]\r\n' not found" input="XCLIENT ADDR=xx.xx.xx.xx LOGIN=[redacted] NAME=[UNAVAILABLE]\r\n" who="SMTP Worker 1"

Error is produced by GetCommandFromString() function because XCLIENT command is not defined into SMTPCommands map.
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@FlyingDR