CiviCRM Community Forums (archive)

I have realised that when I use Gmail SMTP it works fine but when I use sendmail, all the emails bounce.

Is there a simple way to test sendmail?

Quote from: polestar on June 11, 2010, 11:27:52 am

I upgraded CiviCRM to 3.1.5 and tested on a different server. Emails are going out now and are being delivered as well but CiviCRM is still marking them as bounced and changing the email addresses to "ON HOLD".

Hm, this is very strange; can you check whether they’re considered bounces right away (i.e., upon sending, even though they get sent) or after you run your return channel script (CiviMail Processor)?

I assume the former; if so, it’d mean that sendmail is returning an error code even though it delivers – can you check whether sendmail invoked from the shell returns 0 (no errors)?

• I tried sending mail from shell with the same headers & content as it is generated/formed in CiviMail
  
  /usr/sbin/sendmail -i -fb.33.537.1c220b7f6c2c07ea@ -- abc@def.com
  
  The mail got sent but with error code 64 and with the following error.
  
  b.33.537.1c220b7f6c2c07ea@... Hostname required
  
  Again I tried sending mail from shell with the same headers & content, but without -f option
  
  /usr/sbin/sendmail -i -- abc@def.com
  
  This also sent the mail, but successfully without any errors and return code was 0.
  
• From what I can understand from the code, sendmail returns error code 64 because of the following code piece (administrator/components/com_civicrm/civicrm/packages/Mail/sendmail.php) :
  
          // use Return-Path for SMTP envelopeâs FROM address (if set), CRM-5946
          if (!empty($headers['Return-Path'])) {
              $from = $headers['Return-Path'];
          }
  
• And finally, the Bounce is being set because sendmail returns error code 64.