XF 2.2 "503 5.5.1 Error: nested MAIL command" and "554 5.5.1 Error: no valid recipients" / local smtp

[ehd]

Hi, similar to this one: https://xenforo.com/community/threads/503-5-5-1-error-nested-mail-command-from-smtp-server.166213/ I keep getting this daily since the upgrade to 2.2 running the latest version.
The email-addresses (which I changed to example.com) seem to be all right.

What could cause this? Running no external mail-services.

Thanks alot!



Swift_TransportException: Email to xxx@example.com failed: Expected response code 250 but got code "503", with message "503 5.5.1 Error: nested MAIL command " src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php:457

Stack-Trace
#0 src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php(341): Swift_Transport_AbstractSmtpTransport->assertResponseCode('503 5.5.1 Error...', Array)
#1 src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/EsmtpTransport.php(305): Swift_Transport_AbstractSmtpTransport->executeCommand('MAIL FROM:<boun...', Array, Array, false, NULL)
#2 src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php(390): Swift_Transport_EsmtpTransport->executeCommand('DATA
', Array, Array)
#3 src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php(497): Swift_Transport_AbstractSmtpTransport->doDataCommand(Array)
#4 src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php(516): Swift_Transport_AbstractSmtpTransport->doMailTransaction(Object(Swift_Message), 'bounce@xxx', Array, Array)
#5 src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php(206): Swift_Transport_AbstractSmtpTransport->sendTo(Object(Swift_Message), 'bounce@xxx', Array, Array)
#6 src/XF/Mail/Mailer.php(304): Swift_Transport_AbstractSmtpTransport->send(Object(Swift_Message), Array)
#7 src/XF/Mail/Queue.php(138): XF\Mail\Mailer->send(Object(Swift_Message), Object(Swift_SmtpTransport), Array)
#8 src/XF/Job/MailQueue.php(12): XF\Mail\Queue->run(G)
#9 src/XF/Job/Manager.php(258): XF\Job\MailQueue->run(G)
#10 src/XF/Job/Manager.php(200): XF\Job\Manager->runJobInternal(Array, G)
#11 src/XF/Job/Manager.php(84): XF\Job\Manager->runJobEntry(Array, G)
#12 job.php(43): XF\Job\Manager->runQueue(false, 8)
#13 {main}

Status

array(4) {
["url"] => string(14) "/forum/job.php"
["referrer"] => string(83) "https://www.example.com/forum/threads/thread-title.12345678/page-3"
["_GET"] => array(0) {
}
["_POST"] => array(0) {
}
}





and




Swift_TransportException: Email to xxx@example.com failed: Expected response code 354 but got code "554", with message "554 5.5.1 Error: no valid recipients " src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php:457


Stack-Trace
#0 src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php(341): Swift_Transport_AbstractSmtpTransport->assertResponseCode('554 5.5.1 Error...', Array)
#1 src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/EsmtpTransport.php(305): Swift_Transport_AbstractSmtpTransport->executeCommand('DATA
', Array, Array, false, NULL)
#2 src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php(390): Swift_Transport_EsmtpTransport->executeCommand('DATA
', Array, Array)
#3 src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php(497): Swift_Transport_AbstractSmtpTransport->doDataCommand(Array)
#4 src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php(516): Swift_Transport_AbstractSmtpTransport->doMailTransaction(Object(Swift_Message), 'bounce@example.com', Array, Array)
#5 src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php(206): Swift_Transport_AbstractSmtpTransport->sendTo(Object(Swift_Message), 'bounce@example.com', Array, Array)
#6 src/XF/Mail/Mailer.php(304): Swift_Transport_AbstractSmtpTransport->send(Object(Swift_Message), Array)
#7 src/XF/Mail/Queue.php(138): XF\Mail\Mailer->send(Object(Swift_Message), Object(Swift_SmtpTransport), Array)
#8 src/XF/Job/MailQueue.php(12): XF\Mail\Queue->run(G)
#9 src/XF/Job/Manager.php(258): XF\Job\MailQueue->run(G)
#10 src/XF/Job/Manager.php(200): XF\Job\Manager->runJobInternal(Array, G)
#11 src/XF/Job/Manager.php(84): XF\Job\Manager->runJobEntry(Array, G)
#12 job.php(43): XF\Job\Manager->runQueue(false, 8)
#13 {main}

Status
array(4) {
["url"] => string(14) "/forum/job.php"
["referrer"] => string(68) "https://www.example.com/forum/whats-new/posts/3230752/page-2"
["_GET"] => array(0) {
}
["_POST"] => array(0) {
}
}

 

[Mike]

Did these 2 errors essentially come up simultaneously? I suspect that one caused the other.

 

[ehd]

Oh, yes, they are from the same minute.

 

[ehd]

What could cause the error/s?

 

[Mike]

As it stands, ignore it unless it's happening quite a lot. I'm not clear if this is a bug in the mail sending library we use with the specific response of your SMTP server.

If you are getting it regularly, please let us know.

 

[crystyv]

same issue in my server, it's happening quite a lot.
Email address is verified and emails are received....

Swift_TransportException: Email to x@tld.com failed: Expected response code 250 but got code "554", with message "554 Message rejected: Email address is not verified. The following identities failed the check in region US-EAST-2: perfvToowholew <x@tld.com " src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php:457
Generated by: Unknown account 7 April 2021 at 12:19
Stack trace
#0 src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php(341): Swift_Transport_AbstractSmtpTransport->assertResponseCode('554 Message rej...', Array)
#1 src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/EsmtpTransport.php(305): Swift_Transport_AbstractSmtpTransport->executeCommand('
.
', Array, Array, false, NULL)
#2 src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php(404): Swift_Transport_EsmtpTransport->executeCommand('
.
', Array)
#3 src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php(500): Swift_Transport_AbstractSmtpTransport->streamMessage(Object(Swift_Message))
#4 src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php(516): Swift_Transport_AbstractSmtpTransport->doMailTransaction(Object(Swift_Message), 'no-replay@mail....', Array, Array)
#5 src/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php(206): Swift_Transport_AbstractSmtpTransport->sendTo(Object(Swift_Message), 'no-replay@mail....', Array, Array)
#6 src/XF/Mail/Mailer.php(304): Swift_Transport_AbstractSmtpTransport->send(Object(Swift_Message), Array)
#7 src/XF/Mail/Queue.php(138): XF\Mail\Mailer->send(Object(Swift_Message), Object(Swift_SmtpTransport), Array)
#8 src/XF/Job/MailQueue.php(12): XF\Mail\Queue->run(7.99999)
#9 src/XF/Job/Manager.php(258): XF\Job\MailQueue->run(7.99999)
#10 src/XF/Job/Manager.php(200): XF\Job\Manager->runJobInternal(Array, 7.99999)
#11 src/XF/Job/Manager.php(84): XF\Job\Manager->runJobEntry(Array, 7.99999)
#12 job.php(43): XF\Job\Manager->runQueue(false, 8)
#13 {main}
Request state
array(4) {
["url"] => string(8) "/job.php"
["referrer"] => string(50) "https://domain/admin.php?tools/rebuild"
["_GET"] => array(0) {
}
["_POST"] => array(0) {
}
}

 

[ehd]

They keep coming here, too

 

[W1zzard]

Getting this roughly a dozen times each day too.

The underlying reason seems to be that mail is sent to a non-existant domain, which the mail server responds to with "554 5.5.1 Error: no valid recipients" at this point something breaks with the mailer connection, yet swiftmailer keeps trying to send more email.

 

[ehd]

The domains from the errors are legitamit here...And they didn't bounce.

 

[Mike]

A potential workaround is discussed here: https://xenforo.com/community/threads/errorexception-during-email-sending.193045/

2.2.5 will include a fix for this. Note that it only happens in the situation where an error has occurred. We don't really expect the SMTP server to reject an email to a domain it can't resolve (though I'm aware this is a setting of some servers); if that happens, you might need to deal with these errors manually for example, as they wouldn't handle the bounce framework.