Microsoft Exchange SMTP error

  • Resolved marianssen

    (@marianssen)


    1 year, 10 months ago

    Hi there,

    I’m trying to connect to Microsoft Exchange via SMTP. I’m sure the login details are correct (since I can test these to access the mail online). However, I’m receiving authentication error in the log. What could be the reason for this?

    SMTP Debug:
    2023-05-15 08:39:25 Connection: opening to email.visitech.cz:25, timeout=300, options=array()
    2023-05-15 08:39:25 Connection: opened
    2023-05-15 08:39:25 SERVER -> CLIENT: 220 mail.sample.cz ESMTP ready.
    2023-05-15 08:39:25 CLIENT -> SERVER: EHLO www.sample.cz
    2023-05-15 08:39:25 SERVER -> CLIENT: 250-mail.sample.cz Hello uvirt106.active24.cz [31.15.10.143]250-SIZE 15728640250-8BITMIME250-PIPELINING250-PIPECONNECT250-STARTTLS250 HELP
    SMTP Error: Could not authenticate.
    2023-05-15 08:39:25 CLIENT -> SERVER: QUIT
    2023-05-15 08:39:25 SERVER -> CLIENT: 221 mail.sample.cz closing connection
    2023-05-15 08:39:25 Connection: closed
    SMTP Error: Could not authenticate.

Viewing 3 replies - 1 through 3 (of 3 total)
  • Plugin Support Dake

    (@dakeg)

    Hi @marianssen

    Thanks for reaching out and we apologise for the delayed response.

    Just to confirm are you using an APP password that was generated by following the instructions outlined here or here?

    Please keep us posted.

    Thread Starter marianssen

    (@marianssen)

    Hi @dakeg ,

    thank you for your reply. Unfortunately, both of these links are for Office365 setup. Clients server is using Microsoft Exchange, which does not have any of these settings security available (like creating an app password). Is it possible to setup your plugin with Microsoft Exchange?

    Regards

    Plugin Support Dake

    (@dakeg)

    Hi @marianssen

    Thank you for getting back to us and we apologize for the delay because we unfortunately overlooked your response.

    WP Mail SMTP does support being set up on a Microsoft Exchange server, but we have seen previous users experience various issues with connecting to their own Microsoft Exchange SMTP server.

    To determine if this is a general issue with connecting to SMTP servers we would recommend connecting to a different SMTP server by following the instructions outlined in our Other SMTP mailer.

    If your client is open to using an API-based mailer as an alternative, then we’d recommend trying our Brevo/Sendinblue or SendLayer mailers instead.

    Again we apologize for the delay.

Viewing 3 replies - 1 through 3 (of 3 total)
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