sendmail -> lmtp 501 5.6.0 Data format error

[Joseph Tam]

On Thu, 28 Nov 2019, Marc Roos wrote:

> When changing in a working setup sendmail.mc
>
> From this
> MAILER(smtp)dnl
> MAILER(procmail)dnl
>
> To this
> FEATURE(`local_lmtp',`[IPC]',`FILE /var/run/dovecot/lmtp')dnl
> MAILER(local)dnl
>
> I am getting these errors '501 5.6.0 Data format error' and '
> Unrecognized host name'.
> ...
> Eg. When I send email from gmail it looks like this
>    (reason: 553 5.1.2 <xxxx at gmail.com>... Unrecognized host name
> gmail.com.)

Just a stab (I toyed around with LMTP for a while and probably
will eventually use it), but you probably need to retain

 	MAILER(smtp)dnl

Sendmail has semi-cryptic documentation on what it does

 	https://www.sendmail.org/~ca/email/doc8.12/cf/m4/mailers.html

Joseph Tam <jtam.home at gmail.com>