On Sun, Mar 17, 2019 at 10:40:23PM +1100, li...@sbt.net.au wrote: > Mar 17 22:10:53 postfix/smtpd[11975]: warning: > 111-222-333-444.static.tpgi.com.au[111.222.333.444]: SASL LOGIN > authentication failed: UGFzc3dvcmQ6
Try to avoid pasting SASL-generated base64-encoded strings from verbose logs, these often contain easily decoded passwords. In this case "UGFzc3dvcmQ6" just decodes to "Password:", which I hope is not the actual password for the account. > Mar 17 22:14:42 postfix/smtpd[12089]: 5425745329A0: > client=111-222-333-444.static.tpgi.com.au 111.222.333.444], > sasl_method=PLAIN, sasl_username=m...@tld.com.au > Mar 17 22:14:43 amavis[11177]: (11177-17) Passed CLEAN {RelayedOutbound}, > ORIGINATING LOCAL [111.222.333.444]:54608 [111.222.333.444] <m...@tld.com> > -> <dddd...@yahoo.com>, Queue-ID: 5425745329A0, Message-ID: > <7252a376-030e-0a85-cede-d204206bf...@autopack.com>, mail_id: > WUkk9VvorFcd, Hits: 0.076, size: 1111, queued_as: BAE5645329A6, 1303 ms The SASL login name is "m...@tld.com.au". The envelope sender email address is: "m...@tld.com". > the sasl username is 'm...@tld.com.au' BUT on next line they have > 'm...@tld.com' (both domains are valid, tld.com as well as tld.com.au) - > could that be a problem? No. The SASL login name need not be, and often isn't, the same as the envelope sender address. -- Viktor.