Questions tagged [smtp]
SMTP is the Simple Mail Transfer Protocol, the most recent standard of which is defined in RFC 5321. It's the Internet standard for sending and receiving email.
3,183
questions
1
vote
0
answers
31
views
SMTP Port 25 Issue on Nginx Mail Proxy
I set up an Nginx mail proxy server and configured it to distribute to several mail servers as a front-end server. However, I need to open port 25 in the configuration; otherwise, I cannot receive ...
- 11
0
votes
1
answer
60
views
SMTP - How to send mail as @example.com when example.com cannot be used as source server/IP
I have run into a bit of an issue when attempting to set up a mail system where the parent domain, example.com, already has A records and a web server as well as many clients utilizing the parent ...
- 1
0
votes
1
answer
95
views
Set custom ingress port on google cloud run
I'm trying to deploy an SMTP Server on google cloud run and so far I haven't been able to figure out how to attach a TCP/UDP Load Balancer to the back end.
Is there a way for my Cloud Run application ...
google-cloud-platform
-1
votes
0
answers
35
views
Attempting to set up an exim4 SMTP only server that can send out messages from two domains
I am attempting to set a STMP server that can send out messages from two different domains
Adding this line to the the config file (update-exim4.conf.conf)
PRIMARY_HOSTNAME = $sender_address_domain
...
- 1
-3
votes
1
answer
58
views
Gitlab SMTP Configuration
I am new to Gitlab. I configure SMTP in Gitlab that looks like,
{:authentication=>:login,
:user_name=>"My Email",
:password=>"Email ...
1
vote
1
answer
40
views
Postfix connection timeout to all servers
I have Postfix on an Ubuntu server.
postconf mail_version
mail_version = 3.6.4
Every email i send to any recipient ( tried gmail , hotmail and yahoo ) , is stuck in the queue
(connect to alt2.aspmx.l....
- 11
1
vote
2
answers
96
views
Abuse of Abuse reporting system / Feedback loop by spfbl.net
We are getting below abuse emails from Abuse reporting system / Feedback loop by spfbl.net
Can someone explain how are these even valid Abuse emails in any sense at all, because they are clearly being ...
- 19
0
votes
2
answers
128
views
How to configure sendmail to forward all mail to another host?
I have an Ubuntu host with a public DNS A record on example.com. The sendmail program is installed on the host with the sendmail package.
The MX records are set up to use Google Workspace, per Google'...
- 395
1
vote
2
answers
118
views
How can I mitigate a flood of inbound emails that look legitimate to filters?
I have a mail server - postfix, amavis, dovecot. Currently one of my inboxes is being flooded with random email from all over the globe. It's like someone signed me up to 10,000 newsletters all at ...
- 125
0
votes
1
answer
39
views
wordpress + wp mail smtp = email not sending with php mailer
I have a docker wordpress website with WP mail SMTP plugin.
I selected the default PHP
Emails are not sending. sending test email gives a 504 timeout error
php sendmail is installed
Dockerfile for ...
- 57
0
votes
0
answers
31
views
Postfix replace in body by adding CR
I'm trying to configure Postfix body_checks function in order to add a CRLF when an end of attachment is detected using this:
/(.+)--$/ REPLACE $1--\r\n
The regex is correctly applied but the \r\n is ...
0
votes
0
answers
21
views
How to change the sender address using mailutils and postfix?
May 27 14:19:33 localhost postfix/qmgr[21793]: 87FD870AD12: from=user@localhost,
size=398, nrcpt=2 (queue active)
May 27 14:20:03 localhost postfix/smtp[22591]: connect to
mail.rungel.net[95.168.160....
0
votes
2
answers
280
views
554 5.7.1 Relay access denied - cant send mails
I tried to upgrade debian from 10 to 11 and the everything got messed up. Im trying to fix postfix. I can receive emails but cant send. I get the error "554 5.7.1 Relay access denied"
My ...
- 11
0
votes
0
answers
51
views
How to add your own private keys to postfix configuration for DKIM without opendkim or the likes of it?
I have generated the keys locally through openssl added key.pub to the DKIM DNS txt Record but how to add it to postfix withouth any other tool.Is there any connfiguration parameter where the file ...
0
votes
0
answers
39
views
Cant restrict SMTP connection by IP in Amazon SES
I use Amazon SES to send transactional emails (using SMTP connection) from my app and I wanna improve the credentials security by restricting access from specific IPs.
I've created an IAM Policy for ...
- 101