Campaign delivered not to 100%

[Chris33]

Hello Twisted,
Since some days we have a lot of campaign delivered not to 100%
When we look in the sent emails report we have this kind of errors with give up emails instead of being hard bounces or soft bounces :

• Expected response code 354 but got code "554", with message "554 5.5.1 Error: no valid recipients " Log data: ++ Starting Swift_SmtpTransport << 220 vps.unicipate.com ESMTP Postfix (Debian/GNU) >> EHLO digital-mk.com << 250-vps.unicipate.com 250-PIPELINING 250-SIZE 250-VRFY 250-ETRN 250-AUTH PLAIN LOGIN 250-AUTH=PLAIN LOGIN 250-ENHANCEDSTATUSCODES 250-8BITMIME 250-DSN 250-SMTPUTF8 250 CHUNKING >> AUTH LOGIN << 334 VXNlcm5hbWU6 >> bmV3c2xldHRlckB1bmljaXBhdGUuY29t << 334 UGFzc3dvcmQ6 >>
• Connection could not be established with host mail.tablehgt.com :stream_socket_client(): SSL operation failed with code 1. OpenSSL Error messages: error:1408F10B:SSL routines:ssl3_get_record:wrong version number Log data: ++ Starting Swift_SmtpTransport !!
• Connection could not be established with host mail.tablehgt.com :stream_socket_client(): unable to connect to ssl://mail.tablehgt.com:465 (Connection timed out) Log data: ++ Starting Swift_SmtpTransport !! Connection could not be established with host mail.tablehgt.com :stream_socket_client(): unable to connect to ssl://mail.tablehgt.com:465 (Connection timed out) (code: 0)

Do you have an idea why ?

 

[laurentiu]

Do you have an idea why ?

Please follow this steps:

1. Check the SMTP server's status: Make sure the SMTP server is up and running by contacting your email provider or checking their service status page.
2. Verify your SMTP settings: Make sure that your SMTP settings are correct, including the server hostname, port number, username, password, and SSL/TLS settings. Double-check that you are using the correct protocol (SSL or TLS) and that you are using the correct port number (465 for SSL, 587 for TLS).
3. Check firewall settings: Verify that your firewall settings are not blocking the SMTP port or the IP address of the server.
4. Check DNS settings: Ensure that your DNS settings are configured correctly, and that the SMTP server's hostname is resolving to the correct IP address.
5. Check for network connectivity issues: Verify that there are no network connectivity issues between your computer and the SMTP server. You can try pinging the server or running a traceroute to see if there are any network issues.
6. Temporarily disable antivirus software: Antivirus software can sometimes interfere with email traffic. Temporarily disabling your antivirus software can help determine if it is blocking the connection.
7. Contact your email provider: If you have tried all of the above steps and the issue persists, contact your email provider's technical support team for assistance. They may be able to provide additional troubleshooting steps or resolve the issue from their end.

Following this steps you should be able to identify the cause of the issue and resolve it in most cases.