Question
How do I remove maximum limit size for email?
- Posted on June 7, 2015
- EmailDigitalOcean ArticlesConfiguration ManagementDebian
Asked by freshscaped
I have successfully set up an email server using this tutorial: *How To Configure a Mail Server Using Postfix, Dovecot, MySQL*, and SpamAssasin but there appears to be some sort of limit to the size of email attachments I can send or receive. It means I have to resize photographs before sending them and my correspondents cannot understand why they cannot send me pictures either. I need this communication for my work.
Can anybody please tell me where to find where such limits are set among the huge plethora of configuration files in this set up? I have been steadily ploughing through them but it is taking far too long and there are still far to many left to plough through.
I believe it is the server, not the client. But just in case it helps, the client is Thunderbird.
TIA.
This textbox defaults to using Markdown to format your answer.
You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!
These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.
Want to learn more? Join the DigitalOcean Community!
Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in Q&A, subscribe to topics of interest, and get courses and tools that will help you grow as a developer and scale your project or business.
Welcome to DigitalOcean.
To change the maximum limit you need to edit /etc/postfix/main.cf
Search for
message_size_limitusing :Use Google to calculate Bytes to GB (1GB in Bytes) for e.g. 1GB are 1000000000 Bytes
now change
message_size_limitto e.g.message_size_limit = 1000000000if you want 1GBPS: Show some love if it works by clicking the hearth
Thanks Eldin. That’s done the trick. Sorry, I misread your response at first pass. The message size limit line was indeed missing.
That line currently reads “mailbox_size_limit = 0” which, if I understand it correctly, means unlimited in postfix. That’s how I want it. I don’t want a limit set anywhere else either. However, I believe that line refers to the total amount of all the emails, aggregated together, which can be held within a mailbox, not to the maximum size of any one email including attachments.
As it stands I cannot send more than a couple of photos under 1MB and none over 1MB. Which actually confirms the line quoted does not mean zero size of either the mailbox or of the individual messages therein.
I have no wish to change the limit to any particular size. I want to remove it altogether so the arithmetic, which I understand perfectly well already thanks, is irrelevant. But where, if not in /etc/postfix/main.cf, is a limit being imposed?