postfix

Hi, i having exact this Problems here: Unable to send mail: ERROR 550 - Verification failed for [email protected] invalid sender (suddenly since a week or two.) Before it was working fine. This came with an Update? Can some one show how to fix this? This is quite bad...

Our Mailman used to work properly for more than a year. Yesterday we noticed mail sent to mailman is not being accepted. The log reads: "No such user '[email protected]' in mail authorization database". The same error occurs for all the mailing list aliases. We tried to "genaliases" but this...

Hello, I've a installation of plesk v17.8.11 in CentOS server. I've a problem with the email of a domain, the mailboxes recieve dozens of duplicated emails. I don't find documentation of this problems. Can someone help me? Thanks

Hello, Can u explain me how to set "Smart Host" for outbound mails on my Plesk? Thank you/Kind regards,

Hi all, recently I realized that our dev server doesn't send anymore the weekly report of watchdog, neither if I run the task manually. I don't remember but I think that it stops when I changed the hostname from the default one to a new hosted website. I follow this guide to change the...

Hi peeps, we've been struggling with the following issue for some days now: Is it possible to omit sending an autoreplay message if the email is being forwarded or coming from a mailing list? So let's say [email protected] does have an active autoresponder set up for the account. When...

Hello, we have some problems with spam, that is directly send to the server IP, bypassing the external mailfilter specified in the MX. Whats the best way to prevent this? There are some methods to prevent spam directly send to the server, like changing port 25 to an alternative port and then...

Modifications of main.cf like adding special smtpd_recipient_restrictions in etc/postfix disappear after reboot (Ubuntu 18.04, Plesk Onyx 17.8.11 Update #29). How can I make this permanent?

Hello everybody, I have a situation by my Postfix/SMTP. When i want to use a SMTP-connection do i have some problems. My SMTP of my server tells that i have go to smtp.smtp.<domain.com>. And also my webmail fails when i want to send a message. Showing a error with code 250. I want to set my...

Hi, I have a problem with a mailbox that respond with mail forwarding loop like this: postfix/pipe[14005]: A91FE647CD: to=<[email protected]>, relay=plesk_virtual, delay=0.28, delays=0.27/0/0/0.01, dsn=5.4.6, status=bounced (mail forwarding loop for [email protected]) The setup in plesk...

Hi, I do have a problem to resolve hostnames by Postfix. Beneath here i have some code to show to sove the problem. And for now i have some difficulties to solve it. okt 14 08:28:07 edwarddekker postfix/smtpd[14072]: warning: hostname pei-186-0-xc-lii.une.net.co does not resolve to address...

Hi, on one of our SSD Servers, there was some Spam sending Problem last Week ago. The Client had some Viruses on PC and Spammer logged in with Password on that Client Mailbox. After we changed the Password, this Botnet permanently ran against this Mailbox and after 36 hours it looked like he...

Hello guys, Since 2 weeks after an update i am having issues with my mailserver. Mails are being properly delivered to the server but they are not showing up in the mail box of my users. Sometimes mails from either Gmail/hotmail or mails send by sendgrid are delivered. Internal mail (Mail...

By default, Google Compute Engine blocks 25, 465 and 587 SMTP ports and does not allow outbound connections on them. Instances still can receive emails, while sending emails from these ports is not allowed. How to send email from a Plesk server on Google Cloud? So Plesk advise to send emails...

Hello I am using Postfix as Mailserver on Plesk and I am facing the issue that registered Mails can not send to certain providers such as GMX. After some days they get a message back thtat the mail could not be delivered due to the following error: host mx00.emig.gmx.net[212.227.15.9 refused...

Can SPF validation by postfix be disabled when receiving mails from a specific server, for a specific email account, or an entire domain of receiving accounts? My problem is that Germany's largest ISP spoofs the sender address when they forward emails. When someone sends a mail from a domain w/...

Hello, I'm currently exploring Plesk's mail capabilities. I searched for an option to add a "sender address" to individual email accounts of a domain, but couldn't find any. To my surprise, I was able to add a sender address of an existing mail account on the same domain in Outlook, using the...

Hello, i got a fully working mailserver and im playing with the firewall. my idea was, enable the services i really use, and then block all other outgoing and incoming traffic. i think this is i little bit more secure isnt it? so i set it up, leave the enabled presets of plesk like SMTP and IMAP...

What is the goal of this line inside postfix/main.cf? plesk_saslauthd unix y y n - 1 plesk_saslauthd status=5 listen=6 dbpath=/var/spool/postfix/plesk/passwd.db i have notice today about a brute force attack, i had installed Fail2ban but it is...

I am transferring users from an old server to a new one. In the old one I was using courier-imap and in the new, dovecot. I used the courier-dovecot-migrate.pl script to transform the Maildirs to dovecot. For a period of time, I have messages delivered by Postfix that never reached the proper...