sendmail

Minimizing downtime associated with Web/DNS/Mail IP address migrations

Migrating servers to new datacenters or IP addresses is never entirely problem free, usually due to many DNS servers on the internet not obeying TTL’s or caching old records for way too long. These old cached DNS records (usually at different ISP’s, major mailservers like google, hotmail, yahoo, etc.) cause problems where they’ll route mail Continue reading Minimizing downtime associated with Web/DNS/Mail IP address migrations

Sendmail premissions error stopping mail from sending on CentOS 5.1

Really stupid issue with permissions on CentOS 5.1 and real easy fix, since there were improper permissions on the mqueue and clientmqueue directories. The Error message: Tried to send mail via command line using ‘mail’ command, and it returned this error: can not chdir(/var/spool/clientmqueue/): Permission denied Program mode requires special privileges, e.g., root or TrustedUser. Continue reading Sendmail premissions error stopping mail from sending on CentOS 5.1