SMTP Slow Responce in Plesk - Outlook Email Test Fails

29 Aug 2020

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	SMTP Slow Responce in Plesk - Outlook Email Test Fails

Solution This is due to the SMTP mail service provided by the Plesk Control Panel system is configured by default to do a number of remote verification checks when clients connect to send mail. These verification checks are intended to collect more information for security and auditing purposes. Unfortunately, many desktop machines do not currently run the services necessary to respond to these verification checks appropriately, and therefore need to wait for the check to time out -- which takes about 30 seconds (less in the case for the email test send from outlook, as outlook will not wait for the delayed response).

The Fix :-

1. Open up the file '/etc/xinetd.d/smtp_psa' in a text editor such as vi

2. Edit the server_args line to include -Rt0 as the first argument; for example:

server_args = /var/qmail/bin/relaylock /var/qmail/bin/qmail-smtpd /var/qmail/bin/smtp_auth /var/qmail/bin/true /var/qmail/bin/cmd5checkpw /var/qmail/bin/true

would be changed to:

server_args = -Rt0 /var/qmail/bin/relaylock /var/qmail/bin/qmail-smtpd /var/qmail/bin/smtp_auth /var/qmail/bin/true /var/qmail/bin/cmd5checkpw /var/qmail/bin/true

3. Save and close the file

4. Restart the xinetd service, like this:

/etc/init.d/xinetd restart

Regards,

UK VPS Team.
www.uk-vps.com

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15 Oct 2020 12:13 PM

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