Is it possible to use a separate port than port 25 for outgoing emails, if so, how do I configure yunohost to use that port?


Hardware: Dell OptiPlex Server PC
YunoHost version: (stable)
I have access to my server : Through SSH, Webadmin, and Keyboard
Are you in a special context or did you perform some particular tweaking on your YunoHost instance ? : no

Description of my issue

My ISP blocks outgoing port 25, and I can’t find a free SMTP relay service for the life of me, they all want my credit card or want me to wait an obscenely long amount of time to have the possibility of being approved. I was wondering if instead of outgoing port 25, if I could use 587, and still use port 25 for incoming E-Mails, as receiving emails works fine. I just can’t send any. Thanks for the help in advance.

Here are some error messages

The SMTP mail server cannot send emails to other servers because outgoing port 25 is blocked in IPv4.

No it’s not, because “using port 25” ain’t a setting of your server, it’s a setting or convention widly used by other servers across the internet, much like using port 80 or 443 for HTTP and HTTPS

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