Given all the confusion about what is and isn't correct for the mail settings on Greenby (and their legitimate port / security / branding variations), wouldn't a sticky be good as the definitive one-stop-shop guide? You can search for "greenby email settings" etc and get lost in threads which may or may not be correct, particularly when it comes to reports of what their AI bot incorrectly spits out. Forgive me if this does already exist in a non-sticky definitive post, I've clearly missed it.
It could save those regular contributors who do know the score from having to continually post corrections to threads when incorrect or incomplete info is posted. Thanks to all of them who have contributed in the last 6 months or so, allowing me to help my parents out.
The helpful diagnostic sticky https://community.plus.net/t5/Email/Diagnosing-email-server-connectivity-issues-the-guide/td-p/20079... can be a good starting point for the more technically minded. For those less technical I can well imagine it looks very imposing.
Relevant info for the various "brands" could be useful here also as there seem to be some subtle differences.
As for my parents situation, I suspect it is down to them migrating to another ISP a couple of days ago rather than any Greenby server malfunction. I note their "free-online" SMTP username is formatted as <account_name>+<inbox_name> which only works on a plusnet broadband connection IIRC. cURL responses using the full email address format (you@youraccount.branddomain.tld) look much happier. I'll be trying this with them later on. POP was already formatted as (you@youraccount.branddomain.tld) which might explain why they can still receive emails but not send.
