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  1. #1
    New Lounger
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    Generic email sending problems

    My web host can't seem to help me on email send issues. I receive email just fine.

    I thought I might learn SMTP protocol and figure out what the problem is.

    I have to send on (and have been set up to send on) port 26, since ATT blocks port 25. No problem before this week. Problem exists (now) on all my computers, 3 IPs, and mobile devices (which, I guess, have their own IPs when connected to cell towers or wifi out & about). The problem exists on Thunderbird, OE Classic 2.1, Outlook (2010?, maybe 2007), iPhone, iPad, & Android phone.

    Yes, I've tried with and without anti-virus, with and without firewall, all sorts of password authentication standards, and standard ports as well as my non-standard one. Web Host tech support confirms my username, password, and two receive configurations -- POP and IMAP.

    Anybody out there have any thoughts based on available info below? (possible problem/solution, where to go to study the protocol so I might identify possible problem/solution, etc.? [identifying data -web pages, IP, were edited for privacy.] ) Solution may be to nuke web page and related services, and rebuild from clean.

    I get this:
    [ERROR] - An error occurred. Account: "mywebpage.com", Protocol: "SMTP", Task: SMTP send all messages, Server: "trinity.mywebhost.net", Port: 26, SSL/TLS: No (1.0), Error code: 0, Error message: "authentication failed", Last server response: "" For more details look in "Log" tab - error messages are marked in red color.
    [Color didn't transfer. Basically, "535. 5.7.0" lines and "An error occurred. - authentication failed"]

    LOG DETAILS:
    -> EHLO Computer-PC
    <- 250-trinity.mywebhost.net Hello myIPnumber.lightspeed.frsnca.sbcglobal.net [myIPnumber], pleased to meet you
    <- 250-ENHANCEDSTATUSCODES
    <- 250-PIPELINING
    <- 250-8BITMIME
    <- 250-SIZE
    <- 250-DSN
    <- 250-AUTH LOGIN PLAIN
    <- 250-DELIVERBY
    <- 250 HELP
    -> AUTH LOGIN c2NvdHRAZ2l1cmEuY29t
    <- 334 UGFzc3dvcmQ6
    -> ZW1pcjEyMw==
    <- 535 5.7.0 authentication failed
    -> AUTH PLAIN AHNjb3R0QGdpdXJhLmNvbQBlbWlyMTIz
    <- 535 5.7.0 authentication failed
    -> QUIT
    <- 221 2.0.0 trinity.mywebhost.net closing connection
    An error occurred. - authentication failed

  2. #2
    Silver Lounger
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    I have set up AT&T service a few times and was surprised at what I saw on this page, hadn't been aware of the statement:
    http://www.att.com/esupport/article....id=RQVN9unR2t2
    Email server settings (POP and SMTP)

    You'll need to know the current AT&T email server settings, shown in the table below, for setting up an email client for AT&T email. You are only able to use an email client if you created a free att.net account before June 11, 2011.

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    Partenope (2014-09-10)

  4. #3
    WS Lounge VIP
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    Your email server is telling you it doesn't recognise your credentials. Are you sure you are using the same credentials to send and receive?

    cheers, Paul

  5. The Following User Says Thank You to Paul T For This Useful Post:

    Partenope (2014-09-10)

  6. #4
    New Lounger
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    Thanks. I couldn't get to that page, but have tracked ATT.net changes over the last decade.

  7. #5
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    Port 26 is not a port commonly used for SMTP. You have to use whatever port your mail host requires. Port 465 is a commonly used one when port 25 is blocked. But check with your mail host to find out for sure what port you need to use.

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