Support » Plugin: WP Mail SMTP by WPForms » Unable to send mail since PHPMailer Update

  • Hello there,
    I’m using the latest WP version and the latest WP SMTP version.
    Since the WORDPRESS update 4.7.1, I don’t receive the e-mails anymore.
    From my dedicated server, I can successfully send e-mails from another website which don’t use the plugin, so my setup is still correct.
    I’m using ElasticEmail to send the mail and here is the debug info :

    bject(PHPMailer)#19211 (76) {
    string(6) “5.2.22”
    string(5) “UTF-8”
    string(10) “text/plain”
    string(4) “7bit”
    string(35) “SMTP Error: Could not authenticate.”

    I double checked the credentials, everything is working outside of the plugin, nothing was changed before it stopped to send the mails.
    Can someone help me please?

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  • We are having this same issue, but are connected to Mandrill. It looks like the 4.7.1 update caused the emails to stop sending.

    Hopefully the plugin author will release a fix for this soon. Thanks for the great tool.


    For anyone using Mandrill, since this hasn’t been fixed I think we’re switch to Mandrill’s official WordPress plugin at It hasn’t been updated in a while, but it still appears to be working well.

    @atx What settings are you using for Encryption and Authentication?

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