Sendmail submission as client

Christian Weisgerber naddy at
Sat Feb 6 16:45:09 UTC 2016

On 2016-02-05, Alberto Mijares <amijaresp at> wrote:

> However, when sending mail, the server relay.domain.tld says:
> 530 5.5.1 Invalid command: Must issue an AUTH command first
> So, Sendmail is not sending credentials, is not honoring authinfo feature.

Sendmail as shipped with FreeBSD does not support SMTP AUTH.
You need a version compiled with SASL support.

I ran into the same problem, see

Christian "naddy" Weisgerber                          naddy at

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