451 Could not complete sender verify callout29 March 2007·Updated: 20 March 2024·168 words·1 minThis is one of Exim’s more cryptic errors:
Setting the hostname in Sendmail27 March 2007·Updated: 20 March 2024·33 words·1 minIf you need to change the hostname that Sendmail announces itself as, just add the following to sendmail.
Adjust max_execution_time for Horde in Plesk23 March 2007·Updated: 20 March 2024·151 words·1 minOften times, the wonderful webmail application known as Horde will spin out of control and cause unnecessary resource usage and often cause defunct Apache processes to appear.
Quick and fancy mail blacklist checking12 March 2007·Updated: 20 March 2024·68 words·1 minI rarely try to toot my own horn, but I’ve created a pretty handy site.
Stopping Double Bounces in Plesk5 March 2007·Updated: 20 March 2024·15 words·1 minTo stop those evil double bounce e-mails in Plesk, just do:
Disable Dr. Web Notifications in Plesk27 February 2007·Updated: 20 March 2024·43 words·1 minYou can edit /etc/drweb/drweb_qmail.
Finding compromised mail accounts in Plesk10 February 2007·Updated: 20 March 2024·291 words·2 minsIf odd bounced e-mails are coming back to the server or the server is listed in a blacklist, some accounts may be compromised on the server.
Verify that SSLv2 is disabled24 January 2007·Updated: 20 March 2024·74 words·1 minIf you’re looking to get PCI/CISP compliance, or you just like better security, disable SSL version 2.
Repairing the qmail queue11 January 2007·Updated: 20 March 2024·278 words·2 minsThere are three main things to remember when it comes to the qmail queue:
Can’t Kill Sendmail Processes29 December 2006·Updated: 20 March 2024·98 words·1 minIf you find yourself in the sticky situation where kill -9 still won’t kill a sendmail process, check the process list.
Fixing Invalid HELO’s27 December 2006·Updated: 20 March 2024·329 words·2 minsIf your server is spewing an invalid HELO, you could be blacklisted pretty quickly.
Postfix – Forwarding Virtual Mailboxes27 December 2006·Updated: 20 March 2024·63 words·1 minSetting up Postfix to handle mail for a virtual domain and forward it to external mailboxes is pretty easy.