Howdy all.
I'm trying to set up a postfix/dovecot/postfixadmin/vacation.pl system on Ubuntu 22.04
I've got everything working except that the vacation.pl script can't (or won't) connect to localhost to send out auto replies. I'm at a loss as to why, and I've tried searching without any success.
The log_level is set to 2, and log_to_file is 1, writing to /var/log/vacation.log.
I set up a temporary domain and mailbox, and when I send email to it from outside (gmail), the message comes through, and the auto reply is triggered, but all I get in the log is below. Any pointers on what to look for, or how I can debug this? I was able to use telnet to connect to port 25 on localhost and send an email using SMTP commands, so I know that's working. A couple of things I did was to 1) set the debug flag to 1 in the smtp_params array and 2) I commented out the ssl_options (I'm using a self signed cert for the mail server and even though smtp_ssl is 0 and the port is 25, I wanted to make sure it wasn't trying to verify the ssl cert). Thanks, in advance!

2022/08/10 15:43:53 DEBUG> /usr/lib/postfixadmin/vacation.pl:449 main::send_vacation_email - Will send vacation response for [email protected]: FROM: [email protected] (orig_to: [email protected]), TO: [email protected]; VACATION SUBJECT: Out of Office ; VACATION BODY: I will be away from until .
For urgent matters you can contact .
2022/08/10 15:43:53 ERROR> /usr/lib/postfixadmin/vacation.pl:533 main::finally {...} - Failed to send vacation response to [email protected] from [email protected] subject Out of Office: unable to establish SMTP connection to (localhost) port 25

Trace begun at /usr/share/perl5/Email/Sender/Transport/SMTP.pm line 232
Email::Sender::Transport::SMTP::_throw('Email::Sender::Transport::SMTP=HASH(0x5569e10d66c0)', 'unable to establish SMTP connection to (localhost) port 25') called at /usr/share/perl5/Email/Sender/Transport/SMTP.pm line 175
Email::Sender::Transport::SMTP::_smtp_client('Email::Sender::Transport::SMTP=HASH(0x5569e10d66c0)') called at /usr/share/perl5/Email/Sender/Transport/SMTP.pm line 241
Email::Sender::Transport::SMTP::send_email('Email::Sender::Transport::SMTP=HASH(0x5569e10d66c0)', 'Email::Abstract=ARRAY(0x5569e1223aa8)', 'HASH(0x5569e1223be0)') called at /usr/share/perl5/Email/Sender/Role/CommonSending.pm line 45
Email::Sender::Role::CommonSending::try {...} at /usr/share/perl5/Try/Tiny.pm line 102
eval {...} at /usr/share/perl5/Try/Tiny.pm line 93
Try::Tiny::try('CODE(0x5569e12344e0)', 'Try::Tiny::Catch=REF(0x5569e1208068)') called at /usr/share/perl5/Email/Sender/Role/CommonSending.pm line 58
Email::Sender::Role::CommonSending::send('Email::Sender::Transport::SMTP=HASH(0x5569e10d66c0)', 'Email::Abstract=ARRAY(0x5569e1223aa8)', 'HASH(0x5569e12343d8)') called at /usr/share/perl5/Email/Sender/Simple.pm line 119
Email::Sender::Simple::send_email('Email::Sender::Simple', 'Email::Abstract=ARRAY(0x5569e1223aa8)', 'HASH(0x5569e1223c10)') called at /usr/share/perl5/Email/Sender/Role/CommonSending.pm line 45
Email::Sender::Role::CommonSending::try {...} at /usr/share/perl5/Try/Tiny.pm line 102
eval {...} at /usr/share/perl5/Try/Tiny.pm line 93
Try::Tiny::try('CODE(0x5569e1223bb0)', 'Try::Tiny::Catch=REF(0x5569e0b186f8)') called at /usr/share/perl5/Email/Sender/Role/CommonSending.pm line 58
Email::Sender::Role::CommonSending::send('Email::Sender::Simple', 'Email::Simple=HASH(0x5569e11eb458)', 'HASH(0x5569e1223ce8)') called at /usr/share/perl5/Sub/Exporter/Util.pm line 57
Sub::Exporter::Util::ANON('Email::Simple=HASH(0x5569e11eb458)', 'HASH(0x5569e1223ce8)') called at /usr/lib/postfixadmin/vacation.pl line 530
main::try {...} at /usr/share/perl5/Try/Tiny.pm line 102
eval {...} at /usr/share/perl5/Try/Tiny.pm line 93
Try::Tiny::try('CODE(0x5569e12236e8)', 'Try::Tiny::Finally=REF(0x5569e03548a0)') called at /usr/lib/postfixadmin/vacation.pl line 538