Mail will not send e-mails; receive (pop3) is OK

I have AT&T.net (larryspearman@att.net). I have double checked the password for the smtp server and the server names as well for AT&T yahoo mail. Mail has been working fine untIl Tuesday afternoon...now it will receive but will not send anything. The error message I get after I try to send something says the password and user name are not being accepted by the server. Again, I have double checked everything and the password and server names are all correct. I can use Outlook and it works fine...using all the same server and password settings. I have deleted the account and then added it back in, but it still won't work. I am responding to this via my iPad, which works fine, again with the same passwords and server settings. Any help will be welcome! I am using OS X Mountain Lion.

Thanks,

Larry & Carol Spearman

1137 Stone House Rd.

Chaplin, SC 29036-7881

Home ph: (803) 345-2644

Mobile: (803) 741-4935

E-mail: larryspearman@att.net

By the way, here's a look at what connection doctor gives me:

OK, let's try this:

Here's the message I get when I try to send any e-mail:

My POP 3 settings for the server are:

inbound.att.net (POP)

outbound.att.net (SMTP)

I am using the ports given by at&t Yahoo! on their support site (for setting up e-mail). I use those same settings in Microsoft Outlook (Office 2011 for Mac) with no issues. I am now using Outlook exclusively, since Mail can only receive. My iPad also works with those settings. I was using Mail exclusively until Tuesday, then it stopped sending mail.

Also, after deleting the POP 3 account, Mail forces me to add it back as IMAP instead of POP. Someone had given me instructions on how to set up a POP account several months ago, but I can't remember now. Do you have any idea on how to do that. IMAP doesn't always display all my e-mails correctly.

Thanks!

Larry

Well, both of my servers already are att;

inbound.att.net (for POP incoming)

outbound.att.net (for SMTP outgoing)

Not sure what the sbcglobal thing is.

I had already entered the ports you list above (995 for POP and 465 for SMTP). Nothing seems to work. The more I look at this, the more I'm ready to go back to 10.6 or 10.7 instead of this Mountain Lion fiasco! Especially if I can't use POP anymore. I really don't like IMAP so far. I would switch to my MobileMe (or iCloud) e-mail (lws49@me.com, and though it is IMAP too, it seems to work better than att does on IMAP), but the SMTP doesn't work on it either! This is really beginning to remind me of my old Windows 98 days...which was the reason I switched to Mac in the first place!

Thanks for taking the time to try and help...if you think of anything, please let me know when you have the time.😐

OK, I changed the SMTP server for iCloud to smtp.mail.me.com and now I am able to send via the iCloud mail account. See below:

I guess I will start telling all my contacts to use this now instead of my att.net e-mail...and hope Apple doesn't discontinue the service any time soon! Still no luck with att.net SMTP servers in Mail...Outlook still works fine though!

Larry 😀

OK...I'll give that a try later today if I can...the wife and I are headed to the beach (Myrtle) for our 33rd today and won't be back until Sunday afternoon. I already can almost assure that it won't work because my son has a brand new Mac Mini and he has the same exact problems with an att.net e-mail address. I'll give it a shot though. Thanks! 🙂

OK...I created a brand new admin account, logged in and set up Mail with the att.net e-mail. Same result though...incoming works, outgoing does not. I believe there is something about at&t's servers, ever since they combined them with Yahoo!, tha gives Mail a problem...Otherwise, Outlook wouldn't work either. Mail must be doing something in its attempt to verify and log in to the server that causes problems. Thanks again for all your effort sir! Have a great day!

Larry 🙂

This probkem has been fixed by changing the entries in the DNS servers section of network preferences. Thanks. 🙂