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Persistent or keepalive connections to SMTP backends #9

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kayrus opened this issue Jul 12, 2021 · 2 comments
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Persistent or keepalive connections to SMTP backends #9

kayrus opened this issue Jul 12, 2021 · 2 comments

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@kayrus
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kayrus commented Jul 12, 2021

Is it possible to reuse an established SMTP connection for multiple independent auth sessions?

My SMTP backend server allows limited connections per one IP and I'm looking for a solution to reuse TCP connection for multiple independent sessions.
@kayrus kayrus changed the title Persistent or keepalive connections to backends Persistent or keepalive connections to SMTP backends Jul 12, 2021
@emersion
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I'm not aware of any way to do this. RFC 4954 states that once an AUTH command has been issued, no more AUTH commands can be sent for the lifetime of the SMTP session.

@kayrus
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kayrus commented Jul 12, 2021

Thanks for update. I'm closing an issue then.

@kayrus kayrus closed this as completed Jul 12, 2021
This was referenced Jul 22, 2021
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@emersion @kayrus