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Slow Email Delivery

Hi,

I have a server running IIS6 and have a php script that sends out emails. Most emails sent via the script to hotmail address and others get delivered to 'instantly', but the odd few such as btinternet accounts for example take hours!?

The emails are being successfully sent and are not failing or being queued, they just take ages!? Is this my server or the recipients?

Thanks.
Microsoft IIS Web Server

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nacker2000

8/22/2022 - Mon
ASKER CERTIFIED SOLUTION
Chris Dent

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SOLUTION
cj_1969

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ASKER
nacker2000

Thanks for your replies.

I din't have logging enabled so unfortunatly I will have to try resending the emails and see what gets logged.

The reattempts are currently set at:
1st: 15mins
2nd: 30mins
3rd: 60mins
4th+: every 240mins

I have done DNS reports on my server via a third party and everything seems to be configured correctly.

One other thing I did notice and have changed is the size limit was set too low for the email I was trying to send, though it still worked for some of them!? I have now turned of the size limit and have also 'streamlined' the email code.

One other thought would be that I am sending HTML emails via PHP. The formating is correct on the HTML but I am also sending the plain text version as the AltBody, I wonder if this could be causing a problem for some recipients?

I am using the PHPmailer (http://phpmailer.sourceforge.net/) to send my emails.

Thanks.
Your help has saved me hundreds of hours of internet surfing.
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