Gmail very slow to receive Sendmail/PHP Mail


 
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Old 04-26-2016
Reference Gmail very slow to receive Sendmail/PHP Mail

Okay, I have searched the forums and couldn't really find a topic on this, so I decided to start one. But I decided to start a ncurses discussion forum recently and one thing I noticed while getting it going is that when mail is sent out via Sendmail or PHP Mail, Gmail is /very/ slow to receive it. About 15-20 minutes in total. It doesn't matter who the recipient is, as I've tested this with a pool of several different people. But when sending by SMTP, it's instant!

I'd understand if they were using greylisting or something similar, but why is one protocol slow and the other fast? Any insight into this would be greatly appreciated. I have also checked the mail queues and there is no holdups in those, so that can't be it.
 
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mailto.conf(5)							    Apple Inc.							    mailto.conf(5)

NAME
mailto.conf - configuration file for cups email notifier DESCRIPTION
The mailto.conf file defines the local mail server and email notification preferences for CUPS. Each line in the file can be a configuration directive, a blank line, or a comment. Comment lines start with the # character. DIRECTIVES
Cc cc-address@domain.com Specifies an additional recipient for all email notifications. From from-address@domain.com Specifies the sender of email notifications. Sendmail sendmail command and options Specifies the sendmail command to use when sending email notifications. Only one Sendmail or SMTPServer line may be present in the mailto.conf file. If multiple lines are present, only the last one is used. SMTPServer servername Specifies a SMTP server to send email notifications to. Only one Sendmail or SMTPServer line may be present in the mailto.conf file. If multiple lines are present, only the last one is used. Subject subject-prefix Specifies a prefix string for the subject line of an email notification. SEE ALSO
classes.conf(5), cupsd(8), cupsd.conf(5), mime.convs(5), mime.types(5), printers.conf(5), http://localhost:631/help COPYRIGHT
Copyright 2007-2009 by Apple Inc. 12 July 2006 CUPS mailto.conf(5)