Brian May via luv-main <luv-main@luv.asn.au> writes:
I seem to be unable to use postfix to send outgoing email to my accounts on outlook.office365.com:
I think I solved the issue. I added to the config: debug_peer_list = outlook.office365.com ... and retried. I then saw in the logs: :smtp_sasl_authenticate: outlook.office365.com[40.100.148.194]:587: SASL mechanisms LOGIN XOAUTH2 I then tried (not actually expecting it to work) the following config: smtp_sasl_mechanism_filter = plain, login But it did work. So my guess is postfix is somehow getting confused by the XOAUTH2 SASL mechanism. No idea why. Ok, so now I should also be safe from making the post mentioned in https://xkcd.com/979/
# openssl s_client -starttls smtp -connect outlook.office365.com:587
I still don't understand why this doesn't work. Only allows communications in one direction. -- Brian May <brian@linuxpenguins.xyz> https://linuxpenguins.xyz/brian/