Mailpoet3 and Contact Form 7 Conflict

  • On a previously working website the following problem is identified. Contact Form 7 returns an error message: “There was an error trying to send your message. Please try again later.” Having worked through a deconfliction process by turning off all of the plugins I have got down to this:
    If I deactivate Mailpoet3 (which in this case uses the WP_mail() function) then Contact Form 7 works.
    If I deactivate Contact Form 7 and reactivate Mailpoet3, then I can successfully send a message via Mailpoet3.
    If I turn them both on, then neither work.
    Therefore there is some interaction between the two, which looks to be new. I have used both on lots of sites and not had any issues. If one or the other was not configured correctly, then they would not be able to send messages, so that is not the reason.
    I have over 130 sites, and many of them use both Contact Form 7 AND Mailpoet 3. At the time of writing I have not started to check the other sites.
    In this particular case my client reported that messages were not being sent from the contact form. That was the reason why I started to look into this.

    I am not entirely sure right now, but I think if I install an SMTP plugin and completely bypass wp_mail() then both work. That is fine as a solution, but in the past both plugins have played well together. They have been tested in the past and found to be working using wp_mail(). While I have not got to the bottom of this yet, I would prefer not to have to around 100+ sites and reconfigure them all.

    All versions are current as of 13 May 20

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  • Thread Starter Wingers574

    (@wingers574)

    I can confirm that by adding in WP-SMTP plugin which may insert itself where the WP_Mail() call would have been fixes this problem. Even though WP-SMTP is using PHP to send the message still via the hosting. Both plugins now work together.

    Thread Starter Wingers574

    (@wingers574)

    Very disappointed to see there is no answer to this problem, and nobody has bothered to reply. I have a second site with the same problem. With Mailpoet3 disabled Contact Form 7 works. Turn Mailpoet on the website contact form no longer works. This is a reproduceable error

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