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erics, August 12th, 2021 vi /etc/postfix/main.cf
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#inet_protocols = all inet_protocols = ipv4 |
service postfix restart
Categories: How-To's, Technology Email, Error, Gmail, howto, IPv4, IPv6, PostFix, Protocol, tips
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erics, July 16th, 2021 PROBLEM: Email delivery to Google was failing with a “Service Unavailable” error:
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relay=aspmx.l.google.com. [IPv6:2607:f8b0:400d:c0c::1a], dsn=5.0.0, stat=Service unavailable |
Note that the network address for the destination is shown as IPv6! That is the root cause of the issue: 1. Sendmail is sending mail from the IPv6 address instead of the IPv4 address 2. Google rejects IPv6 senders without proper reverse […]
Categories: How-To's, Technology Amazon, Amazzon Linux, AWS, Delivery, DSN, Email, howto, IPv4, IPv6, Linux, make, Restart, SendMail, sendmail.cf, sendmail.mc, service, Service Unavailable, SPF, tips, Unavailable
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