We found 6 dictionaries that define the word mail gateway:

General (1 matching dictionary)

1. mail gateway: Dictionary.com

Computing (4 matching dictionaries)

2. mail gateway: Free On-line Dictionary of Computing
3. mail gateway: CCI Computer
4. I T Glossary (No longer online)
5. mail gateway: Encyclopedia

Medicine (1 matching dictionary)

6. online medical dictionary (No longer online)

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