SMTP Error (451): Failed to add recipient

Vs Nu

• April 27, 2021 11:32

I had installed the cPanel on the Dedicated Machine using with Trial license After installing i have any done any changes on Exim configuration..After adding the domain and DNS Pointed I'm unable to send the Email from webmail (Roundcube) It gives error SMTP Error (451): Failed to add recipient "name@email.tld" please try again later How to fix this issue ? Is there any bug on the cpanel release 94.0.5

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  cPRex Jurassic Moderator

  • April 27, 2021 16:38

  Hey there! Can you make sure that outgoing messages are not suspended on that account for some reason? Details on that can be found here:

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  Vs Nu

  • April 27, 2021 16:45

  It got solved by doing an Force cPanel update Now in outlook I'm getting the following bounce back 'mail@domain.tld' on 27-04-2021 10.12 PM 503 Valid RCPT command must precede DATA But I can able to send mail from webmail (Roundcube)

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  cPRex Jurassic Moderator

  • April 27, 2021 17:43

  I'm glad the cPanel update took care of that first issue. That next error is a common issue with Outlook. Can you check these settings in Outlook to see if that gets things working? Error 503: Valid RCPT command must precede DATA (Outlook 2016) - HostPapa Knowledge Base

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