Resolved WordPress can not send emails to my email server

[Émerson Felinto]

I'm using the Contact form plugin and got an error in sending emails. But what I saw is not an isolated case, since wordpress is not able to send comment notifications. What do I do ?

 

[IgorG]

Do you have any SMTP Wordpress plugins installed? Like WP-Mail-SMTP plugin, for instance?

 

[Émerson Felinto]

No, I do not have it !!!
From what I've researched I know this is a solution, but several of my client's sites have stopped running this feature. How am I going to explain it to them?
Please give me any idea of what's happening

 

[IgorG]

Do you have any related error messages from Plesk maillog?

 

[Émerson Felinto]

How to view this log ?

 

[IgorG]

Just try to send email from your WordPress site and check related records in Plesk maillog /var/log/maillog

 

[Émerson Felinto]

eb 28 00:32:25 hermes journal: plesk sendmail[11698]: handlers_stderr: DATA REPLY:554:5.7.0 The message could not be sent. You are not allowed to use sendmail utility.#012REJECT
Feb 28 00:32:25 hermes journal: plesk sendmail[11698]: REJECT during call 'limit-out' handler
Feb 28 00:32:42 hermes postfix/anvil[9090]: statistics: max connection rate 1/60s for (smtp:91.234.99.214) at Feb 28 00:26:49
Feb 28 00:32:42 hermes postfix/anvil[9090]: statistics: max connection count 1 for (smtp:91.234.99.214) at Feb 28 00:26:49
Feb 28 00:32:42 hermes postfix/anvil[9090]: statistics: max cache size 1 at Feb 28 00:26:49
Feb 28 00:32:54 hermes postfix/smtpd[11874]: connect from unknown[91.234.99.214]
Feb 28 00:32:55 hermes plesk_saslauthd[11884]: listen=6, status=5, dbpath='/var/spool/postfix/plesk/passwd.db', keypath='/var/spool/postfix/plesk/passwd_db_key', chroot=0, unprivileged=1
Feb 28 00:32:55 hermes plesk_saslauthd[11884]: privileges set to (89:89) (effective 89:89)
Feb 28 00:32:55 hermes plesk_saslauthd[11884]: failed mail authenticatication attempt for user 'Warehouse' (password len=4)
Feb 28 00:32:55 hermes postfix/smtpd[11874]: warning: unknown[91.234.99.214]: SASL LOGIN authentication failed: authentication failure
Feb 28 00:32:55 hermes postfix/smtpd[11874]: lost connection after AUTH from unknown[91.234.99.214]
Feb 28 00:32:55 hermes postfix/smtpd[11874]: disconnect from unknown[91.234.99.214]
Feb 28 00:33:25 hermes plesk_saslauthd[11884]: select timeout, exiting

 

[IgorG]

Looks like that Outgoing mail filters are enabled in Tools and Settings->Mail Settings and prevent mail delivery, because mail message limit is reached.
Try to increase "Default limit on outgoing messages from a mailbox" under Plesk->Tools and Settings->Mail Settings , lets try and set it twice and check mail delivery. Or you can disable this option in Plesk->Tools and Settings->Mail Settings

 

[IgorG]

Also go to Tools & Settings > Mail Server Settings and enable the option Allow users and scripts to use Sendmail.

 

[Émerson Felinto]

The problem was with "sendmail" that was disabled.

It's working. It's fantastic!
Thank you =)