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https://support.smtp2go.com/hc/en-gb/articles/223087367
Using Postfix to Speed Up Email Delivery. Sending emails through SMTP works just fine for most people in most situations, but there are times when you may wish you could send your emails even faster than the speed you are currently achieving.
http://www.postfix.org/TUNING_README.html
The active queue becomes saturated with mail that has delivery problems. New mail enters the active queue only when an old message is deferred. This is a slow process that usually requires timing out one or more SMTP connections. All available Postfix delivery agents become occupied trying to connect to unreachable sites etc.
https://support.smtp2go.com/hc/en-gb/articles/223087387-How-to-Speed-Up-Email-Delivery
How to Speed Up Email Delivery. If you are experiencing slow sending speeds, there are a few things to consider. The SMTP protocol can often require many "round-trip" cycles, where your computer/server has to wait for a response from us, and vice versa.
http://postfix.1071664.n5.nabble.com/Speeding-up-Local-Delivery-td18817.html
Victor: I wanted to use Postfix as a delivery mechanism so that I would be able to queue and hold mail during database outages and other maintenance -- a job that it does very well. Is there really no advice available on how to increase the speed of Postfix's local mail delivery? Thanks, Wendy On Wed, Jan 13, 2010 at 8:45 AM, Victor Duchovni <[hidden email]> wrote:
https://serverfault.com/questions/672843/email-sending-speed-how-to-improve
I would reconfigure Postfix to stop scanning outgoing mail. If you have a need to scan outgoing mail normally, e.g. for the people in your office sending mail from their computers, then set up a dedicated mail server specifically for handling the outbound mailing list traffic.
https://blog.mailtrap.io/postfix-sendmail-exim/
Oct 28, 2019 · Postfix, despite its security-orientation, provides a high level of flexibility and ease of administration. For beginner admins, Postfix would be easier to set up than any other MTA. Besides, it implements the Sendmail CLI and is compatible with Sendmail mail filters. However, Postfix is less versatile than Exim.
https://www.nixtree.com/blog/tuning-and-increasing-speed-in-postfix/
Dec 24, 2013 · Performance Tuning and increasing delivery speed in Postfix. December 24, 2013 postfix mta, ... when the message arrival rate exceeds the message delivery rate. With the default 50 Postfix SMTP server process limit, value 1s limits the mail inflow to 50 messages per second above the number of messages delivered per second. ... Another value ...
https://serverfault.com/questions/639615/postfix-and-local-mail
Postfix and “local mail” ... local mail delivery: The default per-user mailbox is a file in the UNIX mail spool directory (/var/mail/user or /var/spool/mail/user); ... So postfix will deliver the mail to mail spool directory or in user's home directory as per your settings.
https://stackoverflow.com/questions/50056664/postfix-with-smtp-slow-sending-speed
All things working fine except one thing, the sending speed is too slow. It is sending around 1 mail per 5 seconds (approx). I have spent 4-5 days already for finding the issue, but not found any solution. There is no problem in my maillog file My Maillog File:
http://blog.mandrill.com/speed-and-redundancy-for-smtp-with-postfix.html
Pipelining is a way to reduce the chattiness of SMTP and using pipelining can significantly speed up delivery of your email to Mandrill's servers for processing. Whether you're already using Postfix or not, there are compelling reasons to use Postfix to speed up …
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