mailpoet 3 – SMTP stuck on send Emails when there is a ‘.’ in its local-part

  • Resolved deniswinkel

    (@deniswinkel)


    4 years ago

    Hi, we got a problem when sending emails in the second we are trying to send “real” newsletters. We are using our own smtp as sending method. When we send directly in the testingarea to any emailadresses it is working, but whenever we start a newslettermailing it stops by this message:

    Das Senden wurde wegen eines technischen Problems mit SMTP pausiert: Expected response code 354 but got code “503”, with message “503 5.0.0 Need RCPT (recipient) Unbearbeiteter Abonnent: [email protected]

    I’ve found a closed thread with a similiar errormessage which is marked as resolved, but held no help for me in it.

    We are still in the testing phase, so we know all our registred testsubscribers are real and active working emailadresses.
    Because it is working while sending in the draftmode, we are also pretty sure the smtp sending method itself is working fine.

    After a lot of testing we found out it seems like the only similarity of all error triggering Emails is the usage of a ‘.’ in the emails local-part. Whenever theres not ‘.’ there’s no error.

    Again: testmails to exactly that errorcausing adresses are getting through, the problems are only when sending the Newsletters to lists.

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

    (@wysija)

    Hi @deniswinkel,

    We have an article about it here:
    Why Sending is Paused when Using SMTP?

    We recommend contacting your host and ask why they are rejecting these specific email addresses.

    Thread Starter deniswinkel

    (@deniswinkel)

    Hi there,

    thanks for your quick response!
    I already checked that mentioned article and talked to the host before.
    I called them, and read it again, and they say, there is no rejection of any emails logged. They not even receiving any sending requests, when the error is shown in the wordpress backend.

    But I found the following:
    when a dot formatted email is triggering the errorcode from before

    -then changing sendingtype from ‘smtp’ to ‘your host/webserver’
    ->sending mail with that configuration works fine
    -set configuration back to ‘smtp’
    ->now sending to problematic emails is also working here

    its a great workaround to send Emails in testingcases but I cant send an Email from host/webserver everytime we get new subscribers.

    Thread Starter deniswinkel

    (@deniswinkel)

    Well, there was one welcome-email which got an sending emailaddress with a typo, fixed that, and everything working fine…

    Can’t explain why the host didn’t see my errorleading tries to send that mailing.
    Whatever.

    Thanks again, for fast response! Great Support Team!

    I think you can ignore everthing that happend in this thread.

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