Thx again Viktor for your helpful answer.
I use Outlook on my phone & I don't find anything that allows me to conf the
connection negociation protocol.
I'll investigate on this.
Furthermore, I thought too that my server didn't support UTF8, but a telnet
revealed that it does, as we can see in the telnet log below :
root@server:~# telnet mailserver.blabla.com 587
Trying www.xxx.yyy.zzz...
Connected to mailserver.blabla.com.
Escape character is '^]'.
220 Bienvenue sur le serveur mail blabla.com !
ehlo its.me.com
250-mailserver.blabla.com
250-PIPELINING
250-SIZE 104857600
250-VRFY
250-ETRN
250-STARTTLS
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250-SMTPUTF8
250 CHUNKING
Regards,
Gaetan
-----Message d'origine-----
De : owner-postfix-us...@postfix.org <owner-postfix-us...@postfix.org> De la
part de Viktor Dukhovni
Envoyé : mercredi 31 mars 2021 23:53
À : postfix-users@postfix.org
Objet : Re: problem connecting from Outlook Android
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.
