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Simple Mail Transfer Protocol. Configuration option in CiviCrm for sending outgoing email.

3 votes
1 answer
5k views

authentication failure [SMTP: STARTTLS failed (code: 220, response: 2.0.0 Start TLS)]

authentication failure [SMTP: STARTTLS failed (code: 220, response: 2.0.0 Start TLS)] Hi I am getting the above error message when trying to setup my outbound email. … I'm using mailgun and have the drupal smtp module setup and working using identical details. Any ideas where to start troubleshooting this? Thanks …
Ewan McLean's user avatar