Tagged: qmail

Source Code Icon 0

Resolving IPv6 issues with GMail using qmail smtp

In case you are running into problems with Google Mail (GMail) rejecting mail from your qmail server running on native IPv6 with the following message 2a00:1450:4013:0c01:0000:0000:0000:001a failed after I sent the message. Remote host said: 550-5.7.1 [xxx:xxx:xxx:xxx::x 12] Our system has detected that this 550-5.7.1 message is likely unsolicited mail....