I used SquirrelMail 1.4.2 with sendmail on my server .
I've got a suggestion:
Almost all advanced mail servers support HTLM mails but current
one, Squirrel, hasn't got this property! For example when sending
colourful HTML mails, All formattings and colours are converted to plain
Inflex - installed on mailserver for domain @itrc.ac.ir
Queries to: admin@