MultiSMTP
FreeAllows the configuration of multiple SMTP servers for outgoing emails, selecting the appropriate server based on the sender's email address.
MultiSMTP extends the standard email capabilities of Znuny and OTRS by allowing the use of different SMTP servers for different sender addresses. This is particularly useful for service providers who manage multiple domains and need to ensure that emails are sent via the correct mail server to avoid being flagged as spam (SPF/DKIM alignment). It includes an administrative interface to manage mappings and supports various encryption methods.
Features
Multiple SMTP Backends
Define and use different SMTP servers for each system email address.
Sender-based Routing
Automatically selects the outgoing mail server based on the sender's address.
Encryption Support
Supports plain SMTP, SMTPS, and SMTPTLS for secure communication.