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At present, using smtpdane -srv submission $DOMAIN without also specifying -tls-on-connect will result in a hang.
(The -submissions shortcut implicitly sets the -tls-on-connect flag.)
We should handle this more gracefully. Hanging forever is not acceptable.
It is acceptable to spot the TLS-on-connect and issue a warning and continue.
It is acceptable to spot the TLS-on-connect and error.
It is acceptable to just have a timeout over the whole handshake and abort when that is exceeded.
At present, we do have the -connect-timeout flag, but that doesn't apply once the connection has been established.
At present, using
smtpdane -srv submission $DOMAINwithout also specifying-tls-on-connectwill result in a hang.(The
-submissionsshortcut implicitly sets the-tls-on-connectflag.)We should handle this more gracefully. Hanging forever is not acceptable.
It is acceptable to spot the TLS-on-connect and issue a warning and continue.
It is acceptable to spot the TLS-on-connect and error.
It is acceptable to just have a timeout over the whole handshake and abort when that is exceeded.
At present, we do have the
-connect-timeoutflag, but that doesn't apply once the connection has been established.Spotted while investigating #7
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