On Fri July 9 2021 11:41:09 Hunter via tde-users wrote:
I'm having to use Disroot's webmail service to send this since I am unable to send mail on Kmail for whatever reason for the past few days. I'm using SMTP and TLS but get the error "unrecognized transport protocol" whenever I try to send a message. Disroot's SMTP uses port 587 and STARTTLS, but I had been using TLS and Plain Text and the weird part is that this worked a few weeks ago but now it isn't. I'm able to get mail via IMAP but can't send anything. Does anyone else use Disroot and/or know how to fix this?
If nothing has changed at your end I suggest you contact disroot and see what has changed at their end.
You could also check your IP in http://www.anti-abuse.org/multi-rbl-check/ although that is not normally applied to authenticated submissions.
--Mike