Emails STOPPED Sending

[BrotherAndrew]

Emails were sending out Very Well for Several Months in my R C Install.  Today I keep seeing A Failed Message when sending out Emails.  What could be causing that?   

[SKaero]

Whats in the error log?

[BrotherAndrew]

These are 2 from today:

[20-May-2013 12:41:42 CST6CDT] MDB2 Error: constraint violation (-3): _doQuery: [Error message: Could not execute statement]
[Last executed query: EXECUTE mdb2_statement_mysql_4c0f9e1ce0895f928d62c3d2b529d3a2c9c9d37e9 USING @0, @1, @2]
[Native code: 1062]
[Native message: Duplicate entry '9iob6st16nf6f5co1t9g22s5a5' for key 'PRIMARY']

[20-May-2013 12:41:42 -0500]: DB Error: MDB2 Error: constraint violation Query: _doQuery: [Error message: Could not execute statement] [Last executed query: EXECUTE mdb2_statement_mysql_4c0f9e1ce0895f928d62c3d2b529d3a2c9c9d37e9 USING @0, @1, @2] [Native code: 1062] [Native message: Duplicate entry '9iob6st16nf6f5co1t9g22s5a5' for key 'PRIMARY']  in /home/mme/public_html/VALUED-USERS-AREA/program/include/rcube_mdb2.php on line 727 (GET /VALUED-USERS-AREA/?_task=mail&_action=check-recent&_mbox=INBOX&_list=1&_quota=1&_remote=1&_unlock=0&_=1369071700808)

[SKaero]

Neither of those errors should be related to the problem, are you using SMTP or PHP is send the mail?

[SKaero]

By "installed from cPanel" do you mean you installed it from Softaculous or a similar script installer or are you just using the RoundCube that comes in cPanel?

[BrotherAndrew]

This is my Custom (Softaculous) Install that I've been using for Several Months.   

[BrotherAndrew]

I desire to see this Resolved ASAP!  Some of my valued web mail users are asking me about this.  Is it possible that Upgrading to 0.9.1 would fix this?!    

[SKaero]

Maybe it would (good idea anyways) but probably not, most likely something changed with the SMTP or PHP setting on the server that has caused it to break.

[BrotherAndrew]

A Squirrel Mail Test WON'T Send Emails Either.   

[ABerglund]

Then you have a mail server problem, not a webmail problem.

[BrotherAndrew]

Below is what I Was told about the server.  It was fine until about 2 days ago.  Does what it say below look like a Valid response to you?   

"I've always had smtp/imap set to require authentication.

Perhaps the latest cpanel update made a change to the config, and it has become more strict.

Regardless, email authentication requirements will not be removed from my servers, as spammers use open relays, and create massive problems."

[ABerglund]

I know nothing about cpanel, as I run my own mail server. But other than that, yes, that is all pretty standard.

[BrotherAndrew]

A post of mine on here that I Deleted, Re Appeared, and Other Posts Disappeared.

If I Edit // SMTP server host (for sending mails) area Properly, should that Solve the Send Emails Issue?!   

[ABerglund]

In theory, yes. In detail, I don't know because I don't know what parameter changed to make them stop. But if you change the SMTP config to match what your email provider says you should use, that should do it.

[BrotherAndrew]

OK, So Correctly Editing the SMPT Sending Emails area in the Config File, is All that's needed to get the Emailing Sending issue Fixed?