On Mon, Jul 18, 2016 at 12:34:06PM -0500, Matthew McGehrin wrote:
> What are you using for local delivery in main.cf? virtual or 
> procmail?

This makes no sense.  virtual(8) delivery is by definition not 
"local(8)".  And procmail (an unmaintained piece of software) is not 
required, never was.

> Usually, I add a domain to relay_domains and virtual
> relay_domains = /etc/postfix/relay_domains

This is not what relay_domains is for.

> virtual_maps = hash:/etc/postfix/virtual

The virtual_maps setting has been deprecated for a VERY long time.  
Please don't advise people in 2016 to use it.

> alias_database = hash:/etc/aliases

That's a default, and irrelevant for relay and virtual ( alias |
mailbox ) domains.

> And then have an associated entry in /etc/postfix/virtual as well:
> @mydomain.com    @localhost

Yikes.  Catchalls are very bad, and that syntax is wrong anyway.

> And confirm that your mail_spool path is configured correctly as well:
> 
> mail_spool_directory = /var/mail

Again irrelevant.

Bob, please disregard all of that post.

> Bob wrote:
> >I am using Ubuntu 16, postfix, dovecot and mailman. I can send 
> >mail, but for some reason, I cannot receive mail. When I try to 
> >send to my address from an gmail account, I get an "undeliverable" 
> >message which states that my user is unknown. Since the user is 
> >the one I use all the time, and there is a MailDir in my home 
> >directory, I don't understand the problem. My mail log from when I 
> >tried sending from my user on my server and when Thunderbird 
> >logged into my user is below

/var/log/mail.log
> Jul 18 10:55:21 server postfix/submission/smtpd[10297]: connect 
> from www.faithwalk.ca[24.72.66.135]
> Jul 18 10:55:21 server postfix/submission/smtpd[10297]: Anonymous 
> TLS connection established from www.faithwalk.ca[24.72.66.135]: 
> TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)
> Jul 18 10:55:22 server postfix/submission/smtpd[10297]: 
> 0F83A1280024: client=www.faithwalk.ca[24.72.66.135], 
> sasl_method=PLAIN, sasl_username=bob
> Jul 18 10:55:22 server postfix/cleanup[10304]: 0F83A1280024: 
> message-id=<578d09f9.4000...@faithwalk.ca>
> Jul 18 10:55:22 server postfix/qmgr[24473]: 0F83A1280024: 
> from=<b...@faithwalk.ca>, size=676, nrcpt=1 (queue active)
> Jul 18 10:55:22 server postfix/submission/smtpd[10297]: disconnect 
> from www.faithwalk.ca[24.72.66.135] ehlo=2 starttls=1 auth=1 mail=1 
> rcpt=1 data=1 quit=1 commands=8
> Jul 18 10:55:23 server postfix/smtp[10305]: 0F83A1280024: 
> to=<bob.lydi...@gmail.com>, 
> relay=gmail-smtp-in.l.google.com[74.125.199.26]:25, delay=1.3, 
> delays=0.05/0.16/0.61/0.52, dsn=2.0.0, status=sent (250 2.0.0 OK 
> 1468860923 y67si4331367pfy.250 - gsmtp)
> Jul 18 10:55:23 server postfix/qmgr[24473]: 0F83A1280024: removed

That's a successful submission and relay outbound.

and
> Jul 18 10:55:54 server dovecot: pop3-login: Login: user=<bob>, 
> method=PLAIN, rip=24.72.86.239, lip=24.72.66.135, mpid=10317, TLS, 
> session=<br9u1+s3o+0YSFbv>

POP3 was outdated before the millennium.  Also, Dovecot logs are 
[mostly] not relevant here.

> and this is from an email I tried to send using an email 
> verification site.

> Jul 18 10:23:17 server postfix/smtpd[9627]: connect from 
> mail.paolapacheo.qz301.com[185.31.205.11] Jul 18 10:23:18 server 
> postfix/smtpd[9627]: 17166128002A: 
> client=mail.paolapacheo.qz301.com[185.31.205.11] Jul 18 10:23:18 
> server postfix/smtpd[9627]: 17166128002A: reject: RCPT from 
> mail.paolapacheo.qz301.com[185.31.205.11]: 550 5.1.1 
> <omquqzat...@faithwalk.ca>: Recipient address rejected: User 
> unknown in local recipient table; 
> from=<rayna.wave+bob=faithwalk...@mail.paolapacheo.qz301.com> 
> to=<omquqzat...@faithwalk.ca> proto=SMTP 
> helo=<mail.paolapacheo.qz301.com>

"Faithwalk.ca" is in your $mydestination, but "omquqzat1gw" is not a 
valid system user or alias.  Was this unexpected?  Should that 
address exist?

> and when I try to send mail insystem from bob to bob, the mail 
> bounces

> Jul 18 11:15:26 server postfix/submission/smtpd[10653]: connect 
> from www.faithwalk.ca[24.72.66.135]
> Jul 18 11:15:26 server postfix/submission/smtpd[10653]: Anonymous 
> TLS connection established from www.faithwalk.ca[24.72.66.135]: 
> TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)
> Jul 18 11:15:26 server postfix/submission/smtpd[10653]: 
> 4EF3B1280077: client=www.faithwalk.ca[24.72.66.135], 
> sasl_method=PLAIN, sasl_username=bob
> Jul 18 11:15:26 server postfix/cleanup[10657]: 4EF3B1280077: 
> message-id=<578d0eac.8020...@faithwalk.ca>
> Jul 18 11:15:26 server postfix/qmgr[24473]: 4EF3B1280077: 
> from=<b...@faithwalk.ca>, size=661, nrcpt=1 (queue active)
> Jul 18 11:15:26 server postfix/submission/smtpd[10653]: disconnect 
> from www.faithwalk.ca[24.72.66.135] ehlo=2 starttls=1 auth=1 mail=1 
> rcpt=1 data=1 quit=1 commands=8

The mail was accepted from the client, but ...

> Jul 18 11:15:26 server postfix/pipe[10658]: 4EF3B1280077: 
> to=<b...@faithwalk.ca>, relay=mailman, delay=0.31, 
> delays=0.06/0.01/0/0.25, dsn=5.1.1, status=bounced (user unknown)

... For some reason you have sent this address to a pipe(8) 
transport(5) which is called "mailman".

That part was not explained, and the configuration information as 
described in DEBUG_README.html#mail was not provided.
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