Your software
My Mautic version is:3.0
My PHP version is:7.3
Your problem
My problem is:
In LoggerPlugin.php line 124:
Cannot send message without a sender address
Log data:
++ Starting Swift_Transport_EsmtpTransport
<< 220 myHost.com ESMTP Postfix
EHLO hub.mydomain.com
<< 250-myhost.com
250-PIPELINING
250-SIZE 10240000
250-ETRN
250-STARTTLS
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250-SMTPUTF8
250 CHUNKING
STARTTLS
<< 220 2.0.0 Ready to start TLS
EHLO hub.mydomain.com
<< 250-myHost.com
250-PIPELINING
250-SIZE 10240000
250-ETRN
250-AUTH DIGEST-MD5 CRAM-MD5 PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250-DSN
250-SMTPUTF8
250 CHUNKING
AUTH LOGIN
<< 334 VXNlcm5hbWU6
aW5mb0B0ZWNocGhlbm9tZW5vbi5jb20=
<< 334 UGFzc3dvcmQ6
RGlhYmxvdGVrMTk3OA==
<< 235 2.7.0 Authentication successful
++ Swift_Transport_EsmtpTransport started
!! Cannot send message without a sender address (code: 0)
swiftmailer:spool:send [–message-limit MESSAGE-LIMIT] [–time-limit TIME-LIMIT] [–recover-timeout RECOVER-TIMEOUT] [–mailer MAILER] [–transport TRANSPORT] [-h|–help] [-q|–quiet] [-v|vv|vvv|–verbose] [-V|–version] [–ansi] [–no-ansi] [-n|–no-interaction] [-e|–env ENV] [–no-debug] [–]
These errors are showing in the log: listed above
Steps I have tried to fix the problem: cleared cache restarted postfix & dovecot and threw a silver dollar down a wishing well