Mail settings - pop3 / smtp - Windows10 vs Windows11 - Outlook (classic)

[#1]

Cloudflare

What SMTP port should be used? Port 25, 587, or 465?

https://www.cloudflare.com/en-gb/learning/email-security/smtp-port-25-587/

Although port 465 is the recommended port for secure SMTP email transmission, some systems sometimes rely on ports 25, 587, or 2525.

Me? I'd just use the recommended settings, rather than rolling my own - which is what so many seem dedicated to doing.

But then, I don't use client email programs, so I can send and receive emails without any of these issues. 😊

[#2]

So reading that article

465 with SSL
Replaced by using 587 with starttls
And now (well since 2018) back to 465 but with implicit TLS.

No wonder there doesnt seem to be a single answer

[#3]

---

@pvmb wrote:

@Penny 

"I also went to look on greenby - where all three accounts have migrated and are operational - and didn't discover anything that looked like server settings, ports, encryption or whatever, or would have copied them across."

But they are all there, listed on the Greenby portal under Email Settings:

Email Client Settings (From Greenby Portal)

Incoming Server Address imap.plus.net
Protocol IMAP
IMAP Port 993 (Encryption Enabled)

Outgoing Server Address relay.plus.net
SMTP Port 465 (Encryption Enabled)

If you prefer to use the POP protocol rather than IMAP then please use port 995 with Encryption turned on

---

Do you by any chance have a link for the above settings (?)

I just went to look - again - to see if I could find them - and instead found this page: https://greenby.com/support/knowledgebase/article/29 

 So I tried those settings again - and this time it *worked* (for all three).  Had tried those - along with very many other combinations - several times, and again today, earlier.  What I think made the difference this time, was changing postmaster@ username.plus.com to username@ username.plus.com.

... so this might have been where I stuffed up previously (have always used postmaster@ or admin@, for previous mail set-ups).  On this occasion, the first plus.com site tried, the above 110/25 settings were not accepted and I simply changed postmaster@ to username@ ... and it worked, instantly.

... so I followed the same process for the other two - which also worked, instantly.

Subsequently (as Outlook had created new, separate, .pst files for each) I had to follow the sequence previously discovered - 

Start - Control Panel - small icons - Mail (Microsoft Outlook) - E-mail accounts - Email tab - click 'change folder' bottom left - next screen select New Outlook data file - and then (for me) disregard the offered Windows - Users - my name - documents - outlook files options (that MS Outlook presents), and instead click (on the left) Windows (C:) - (NAME) - aaa mail folders pst - and select from the three already-created .pst files for recent-years mail

... so as to group everything where it belonged, and then in Outlook right-click each of the surplus new folders to remove, but minor hassle compared with the long delays in getting these three accounts set up in the first place.

... and yes, they might even work now with encrypted settings, but disinclined to do any more tryouts, these will do perfectly fine as they are  😁   and they were never encrypted on the Windows 10 PC in the first place.

Thanks to everyone for the replies - and *soooo* glad this is all, finally, sorted, now.

.