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Gmail very slow to receive Sendmail/PHP Mail

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email, gmail, php, sendmail, smtp, web

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# 1  
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.
# 2  
Old 04-26-2016
You have sendmail configured to queue mail outgoing and send the mail every 15 minutes. Check how you start sendmail services - there are two, one for inbound one for outbound.

BTW sendmail uses SMTP, too.
The Following User Says Thank You to jim mcnamara For This Useful Post:
Phobos D'thorga (04-26-2016)
# 3  
Old 04-26-2016
Quote:
Originally Posted by jim mcnamara
You have sendmail configured to queue mail outgoing and send the mail every 15 minutes. Check how you start sendmail services - there are two, one for inbound one for outbound.

BTW sendmail uses SMTP, too.
Okay...

Code:
define(`confCONNECTION_RATE_WINDOW_SIZE',`10m')dnl

I edit that line? Thank you, by the way
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