On Wed, Mar 31, 2021 at 11:29:04PM +0200, gde...@ngservers.com wrote:
> I can't send emails while using my android smartphone + outlook.
Perhaps your phone is sending SMTP commands with non-ASCII data, but
your Postfix server is not configured to support SMTPUTF8. However,
more likely your phone is trying to use "implicit TLS" (rather
than STARTTLS), and the non-ASCII data in question is the binary
TLS client HELLO message.
> Here is the debug log I can get :
You have needlessly enabled debug logging, please turn it off,
it is just a distraction.
> Mar 31 23:23:00 mail postfix/submission/smtpd[23279]: <
> pop.92-184-97-113.mobile.abo.orange.fr[92.184.97.113]: ????
This is more likely to be TLS than a non-ASCII command.
> Mar 31 23:23:00 mail postfix/submission/smtpd[23279]: <
> pop.92-184-97-113.mobile.abo.orange.fr[92.184.97.113]: ????
Ditto. A packet capture can confirm the hypothesis, but
probably not necessary. Make sure the client is configured
to do STARTTLS.
--
Viktor.
